—Excuse me, could you tell me where the post office is?
—__________, but I’m a stranger here.
A.I’m not sure | B.I’m sorry | C.That’s right | D.I’m afraid not |
Not only his parents but also his sister ________ the museum.
A. are going to B. is going to c. are going D. is going
This book is worth _____.
A.to read it | B.reading it | C.reading | D.to read |
We should do ___ the teacher told us.
A.because | B.like | C.as | D.since |
The number of the people in the world ______ growing faster and faster.
A. is b. are C. have D. were
I’m sorry to have kept you ________ for a long time.
A. wait b. to wait c. waiting D. to be waiting