Some more trees need ________ beside the road.
| A．to plant | B．to be planted | C．planted | D．plant |
We went to the beach last Sunday, and we had great fun _____ volleyball.
| A．play | B．playing | C．played |
D．to play |
—Lily,______ do you study for a math best? —By asking my teacher for help.
| A．how | B．who | C．why | D．what |
—Tom, you look tired this morning. What’s wrong?
—I was so busy that I didn’t go to bed _____ 12 o’clock last night.
| A．until | B．when | C．though | D．unless |
—I hope the summer vacation will come soon.
—_______.It’s really relaxing.
| A．So I did | B．So I do | C．So did I | D．So do I |
—What do you think of the two backpacks? —______ of them are very nice.
| A．Either | B．Both | C．Each | D．All |