—Helen, why didn’t you come to the party yesterday?
—Oh, I ________ for the speech competition.
| A． |
prepares |
B． |
prepared |
C． |
will prepare |
------ What a nice motorbike! How long have you ______ it?
------ About half a year.
A. had B. receive C. bought
There are several chemical factories ______ waste water into the river.
A. pours B. pour C. pouring
Jim has been to the Great Wall before, ______ he?
A. has B. does C. hasn’t
The city has improved a lot _________ I came here a few years ago.
A. sinceB. forC. when
The weather in summer here is cooler than ______ in Beijing.
A. this B. that C. it