— I wonder _________ or not the animal signs are kept in a fixed order.
— Oh, they should be.
| A．if | B．whether | C．that | D．how |
—Will you have a picnic tomorrow?
—Yes．But if it________，we’ll visit the museum instead．
A．will rain
B．rains
C．doesn’t rain
The river will be dirtier and dirtier________we do nothing to protect them．
| A．since |
| B．if |
| C．unless |
| D．until |
—________
—I have a fever．
| A．How are you doing? |
| B．Are you all right? |
| C．What’s the matter with you? |
| D．Do you have a fever? |
—Mum，I have a cold．
—You________go to a doctor．I’ll take you to hospital．
| A．should |
| B．shouldn’t |
| C．need |
| D．needn't |
The doctor advised my father to________smoking．
| A．get up |
| B．stay up |
| C．put up |
| D．give up |