—Hi, Susan, you look tired.
—I ______ for months for the coming celebration for the school’s 60th anniversary.
| A．was preparing | B．have been preparing | C．had prepared | D．prepare |
Our English teacher has __________ son.
| A．a 8-year-old | B．an 8-years-old | C．a 8-years-old | D．an 8-year-old |
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