In such dry weather, the flowers will have to be watered if they __________
| A．have survived | B．are to survive |
| C．would survive | D．will survive |
Mary went to the box office at lunch time, but all the tickets ____out.
| A．would sell | B．had sold | C．have sold | D．was selling |
You have failed two tests. You’d better start working harder, ____ you won’t pass the course.
| A．and | B．so | C．but | D．or |
—Did you return Fred’s call?
—I didn’t need to ____ I’ll see him tomorrow.
| A．though | B．unless | C．when | D．because |
Many children， ______ parents are away working in big cities，are taken good care of in the village.
| A．their | B．whose | C．of them | D．with whom |
____ parents say and do has a life-long effect on their children.
| A．That | B．Which | C．What | D．As |