—Did you have any trouble with the customs officer? —________ to speak of.
Our English teacher has __________ son.
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