Why don’t you _________your teacher for help?
| A．ask | B．to ask | C．asking | D．asks |
________ is good for your health.
| A．Taking exercise | B．Take exercise |
| C．Take exercises | D．Took exercise |
—Are there any trees on _____ sides of the new street?
—Yes, there are.
| A．other | B．another |
| C．both | D．each |
While I _____ my homework in my room, my mother _____ in the kitchen.
| A．did; cooked | B．was doing; cooked |
| C．did; was cooking | D．was doing; was cooking |
We ____ _each other since I left Shanghai.
| A．haven’t seen | B．hadn’t seen |
| C．didn’t see | D．wouldn’t see |
—Did that sportsman win ____ gold medal at ____Athens Olympics?
—Yes, he did.
| A．a; an | B．a; the |
| C．a; / | D．/; the |