We’ll do what we can ________

We’ll do what we can _________ our environment.

#49518

protect　

to protect　

be protected　

be protecting

推荐题目

 Simon is very confident. He isn’t afraid of ______ in the whole school.

#49170

make a speech

making a speech

makes a speech

made a speech

He must stop_________ jeans, because they are out of style.

#49056

to wear

wearing

wore

wear

You must eat all kinds of fruits and vegetables         a balanced diet.

#49061

have

to have

having

had

I think it’s important      Chinese well, because I am Chinese.

#49611

to learn

learn

learning

learned

---Why does Tommy look unhappy ? --- Because his teacher makes him _______ the classroom all by himself .

#50728

to clean

clean

cleans

cleaning

共1553题