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

There is a bird        in the sky.

#50711

fly

flying

flies

to fly

 Let that boy_______some dessert.

#49854

have

has

to have

to has

Seeing their teacher _______ into the classroom, they stopped _______ at once.

#49275

walk; telling

entering; to speak

enter; to tell

walking; talking

Xiao Li was supposed __________ her homework before nine o’clock. But she couldn’t.

#49490

to finish

to finishing

finish

finishing

——Let’s _    to the movies now.   ——That         great.

#50474

going, sounding

go, sounds

go, sound

goes, sounds

共1553题