_____60 miles a day,you need your mountain bike in a very good state.
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 _____.
We should do ___ the teacher told us.
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