阅读下面短文，在空格处填入一个适当的词或用括号中词语的正确形式填空，并将答案写在答题卡规定的位置上
    Paulina Cortes is a teacher in California.One day，she handed out masks to farm workers in Lodi.She volunteered to do this（1）

because

because

the air quality is still poor after a big fire.
    "I just got home and feel （2）

really

really

（real） tired now.Today I spent my day in Lodi（3）

handing

handing

（hand） out masks to farm workers，" she wrote on the Internet."I raised some money.Then I drove through San Jose and all the way to Salinas （4）

to buy

to buy

（buy） enough masks I needed.This is important.The story here isn't that I handed out masks；it's that there are hundreds of people （5）

who

who

are working in dangerous environments with no （6）

protection

protection

（protect）.And no one even knows about it."
    Paulina also put some photos on the Internet，and they （7）

were picked

were picked

（pick） up by the news.Many people were surprised at the news，and they knew what happened to those farm workers （8）

for

for

the first time.
    The next day，Paulina added， "I traveled through Lodi and Stockton not just to hand out masks，（9）

but

but

to help the farm workers understand the pollution.In Lodi yesterday the workers were picking fruit in such dangerous environments.None of them even knew this.Not too far from our homes，hundreds of people are working in these environments.I will buy （10）

more

more

（many） masks and send them to farm workers in Stockton."
    Thank you，Paulina，for caring and trying to make a difference.