—Listen! There someone at the door.
—It must be your sister.
A. is; knocking B. is; knock
C. are; knocking D. are; knock
The movie is so interesting that I don’t seeing it again tomorrow.
A. enjoy B. mind C. keep D. finish
We to start at once, or we will miss the train.
A. tell B. have told
C. are told D. told
—How many times Carl to the Great Wall?
—Only once.
A. does ;go B. did; go
C. has; gone D. has; been
The traffic signs warn people after drinking.
A. to drive B. not to drive
C. driving D. don’t drive
A smile nothing, but gives much.
A. costs B. spends C. cost D. spend
