"Alex!Jen!It's time for dinner!"Mom called.
    "Mom!We （1）

are making

are making

（make） a treehouse!Wait a minute!" Alex shouted.
    At dinner，Dad said，"We have something to tell you.Our neighbor，Mr Morris，came to our house （2）

to talk

to talk

（talk） to us today.He wants us to cut down our tree because the leaves fall into his yard.Then he has to clean them."
    "No!That's our favorite tree.I （3）

have loved

have loved

（love） it ever since I was just a little baby! "Jen cried.
    "Yeah，and the tree is old and beautiful.It helps keep our air clean.It also（4）

gives

gives

（give） us shade（树荫） from the sun，" Alex said.
    Everybody had special memories of the tree.They all shared their favorite ones.
    "One of my favorite memories is how excited you were when the leaves began to fall，"said Mom. "We（5）

jumped

jumped

（jump） into the huge piles （堆） of colorful leaves every autumn，"said Alex.Jen nodded.
    "I remember the time we had a picnic for the whole neighborhood，"said Dad."It was so nice."
    "It's brought us all so many great memories.Something must be done."Mom said.
    "Yes，"said Jen. "We（6）

must save

must save

（save） our tree!"
    After dinner the whole family discussed what to do.
    "I have a good idea! "said Alex. "I can make a chart showing him when leaves fall.And we can promise him that we （7）

will help

will help

（help） clean the leaves in the future!"
    Everyone agreed.The next day，the whole family went to visit Mr Morris.At that time，he（8）

was cleaning

was cleaning

（clean） the yard.
    "Mr Morris，this tree is very special to our family.If we offer to help clean its leaves，would you consider（9）

keeping

keeping

（keep） it？"Dad said.
    Alex handed Mr Morris his chart.Mr Morris was quiet for a moment.Then he said，"I guess if the tree is that important to you all，and I can get some help with cleaning，the tree can stay."
    The tree （10）

was saved

was saved

（save）!Everyone in the neighborhood，even Mr Morris，came to celebrate.