1. ―What _____ do you choose, small, medium or large?

―Large, please.

A. color.        B. size

C. price.        D. kind

2. The child doesn’t need any help. He is old enough to _____ himself.

A. put on         B. wear

C. dress      D. take care  

3. If you want to be thinner and healthier, you should eat _____ food and take _____ exercise.

A. more; fewer     B. more; less

C. fewer; more     D. less; more

4. I hate traveling by air _____ you usually have to wait for hours before the plane takes off.

A. because    B. though

C. until          D. unless