--- We don’t allow _________ in the library .
--- So we had better _________ outside .
| A．smoking , smoking | B．to smoke , smoking |
| C．to smoke , to smoke | D．smoking , smoke |
I won’t pass the exam ______I work hard..
| A．whenever | B．because | C．if | D．unless |
I like music that I can dance _______.
| A．from | B．by | C．with | D．to |
In the past the children were made ______15 hours a day.
| A．to lock | B．work | C．to work | D．lock |
When I got to school, Amy ______his homework.
| A．had invented | B．had finished | C．had developed | D．had rushed |
Did you see Peter and Mike? No, I saw ______of them.
| A．neither | B．either | C．both | D．none |