北师大版（2019）必修第一册《Unit 3 Celebrations Lesson 1》2021年同步练习卷（帮课堂）
发布：2024/4/20 14:35:0
题组A 基础过关练1.单词拼写
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1．At the wedding，he sang a song specially written for the o
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2．The directors received letters of
（祝贺）after the film My People My Homeland was widely praised.组卷：8引用：3难度：0.8 -
3．Any children who want to play the game must be accompanied by a（n）
（成人）.组卷：0引用：2难度：0.9
题组B 能力提升练
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10．Unsolved Mysteries About the Planet EarthMystery 1：Where did water come from？
Water covers more than 70 percent of the Earth's surface and that makes the Earth earn the nickname "the blue planet".Then where did water come from？The most popular scientific theory states that the H2 came from several violent asteroids（小行星）covered with ice.Another suggests that the water actually has been around since the Earth's formation.However it happened，though，it's certainly worked out well for the Earth life forms.
Mystery 2：What about all the oxygen？
Another thing is the planet's oxygen.Tiny creatures released oxygen as a waste product，filling the atmosphere with it.After that ，the level of oxygen in the Earth's atmosphere went wildly up and down until it finally calmed down around 540 million years ago.Since then，it's remained at about the breathable level we know today.But what caused it to be suddenly steady？
Mystery 3：What caused the Cambrian（寒武纪）Explosion？
The Cambrian Explosion refers to the explosion of complex life forms that occurred on Earth about 540 million years ago.Before then，life had consisted mostly of microbes.But at the beginning of the Cambrian period complex creatures began developing at a rate never seen before.Suddenly，life forms had brains，eyes，and bones.Most living creatures today can trace their blood back to the Cambrian period.
Mystery 4：Will we be able to predict earthquakes？
We still haven't been able to come up with a way to accurately predict earthquakes.We can certainly try，but our current technology cannot predict them exactly.We know that earthquakes start when the rock cracks underground and the enormous energy released in the process causes vibration，which generates earthquake waves，but we haven't figured out why that happens，or how to predict it.
（1）What was created by creatures on Earth？
A．Water.
B．Bacterium.
C．Oxygen.
D．Ice.
（2）Which of the following talks about the Earth's advanced species？
A．Mystery 1.
B．Mystery 2.
C．Mystery 4.
D．Mystery 3.
（3）What do we know about Mystery 4？
A．It is a matter that has extremely practical significance.
B．It will be solved in the near future.
C．It is the most difficult mystery to solve of the four.
D．It is the oldest mystery of the four.组卷：6引用：1难度：0.5 -
11．The freezing Northeast hasn't been a terribly fun place to spend time this winter，so when the chance came for a weekend to Sarasota，Florida，my bags were packed before you could say "sunshine"．I left for the land of warmth and vitamin C（维生素C），thinking of beaches and orange trees.When we touched down to blue skies and warm air，I sent up a small prayer of gratefulness.Swimming pools，wine tasting，and pink sunsets（at normal evening hours，not 4 in the afternoon） filled the weekend，but the best part- particularly to my taste，dulled by months of cold-weather root vegetables- was a 7 a．m.adventure to the Sarasota farmers' market that proved to be more than worth the early wake-up call.
The market，which was founded in 1979，sets up its tents every Saturday from 7 a．m.jye.ai 1 p．m.，rain or shine，along North Lemon and State streets.Baskets of perfect red strawberries；the red-painted sides of the Java Dawg coffee truck；and most of all，the tomatoes：amazing，large，soft and round red tomatoes.
Disappointed by many a broken，vine-ripened（蔓上成熟的） promise，I've refused to buy winter tomatoes for years.No matter how attractive they look in the store，once I get them home they're unfailingly dry，hard，and tasteless.But I homed in，with uncertainty，on one particular table at the Brown's Grove Farm's stand，full of fresh and soft tomatoes the size of my fist.These were the real deal- and at that moment，I realized that the best part of Sarasota in winter was going to be eating things that back home in New York I wouldn't be experiencing again for months.
Delighted as I was by the tomatoes in sight，my happiness deepened when I learned that Brown's Grove Farm is one of the suppliers for Jack Dusty，a newly opened restaurant at the Sarasota Ritz Carlton，where- luckily for me- I was planning to have dinner that very night.Without even seeing the menu，I knew I'd be ordering every tomato on it.
（1）What did the author think of her winter life in New York？
A．Exciting.
B．Boring.
C．Relaxing.
D．Annoying.
（2）What made the author's getting up early worthwhile？
A．Having a swim.
B．Breathing in fresh air.
C．Walking in the morning sun.
D．Visiting a local farmers' market.
（3）What can we learn about tomatoes sold in New York in winter？
A．They are soft.
B．They look nice.
C．They taste great.
D．They are juicy.
（4）What was the author going to do that evening？
A．Go to a farm.
B．Check into a hotel.
C．Eat in a restaurant.
D．Buy fresh vegetables.组卷：8引用：1难度：0.5
