She spent a lot of time ________

She spent a lot of time _________the fire that day．

#50622

to put out

putting out

to put on

putting on

推荐题目

The problem is         difficult for me        work out.

#51005

very; to

enough; to

so; that

too; to

—It’s necessary ____ our environment(环境).  —I agree with you.

#50553

protect（保护）

protecting

to protect

protects

The students enjoy _________ English songs after class.

#50140

practice to sing

practicing singing

to practice singing

to practice to sing

Mr Li taught me     in the river when I was a child.

#49893

to swim

swam

swimming

swims

---On summer nights the weather is usually very hot.---Yes, so I often go to sleep ______ the windows ______.

#49009

with, on

have, open

with, open

with, closed

共1553题