Elephants would ______ if men were allowed to shoot as many as they wished.
| A．die down | B．die out | C．die away | D．die off |
—Have you nearly finished?
—, we have just begun.
| A．Above all | B．After all |
| C．On the contrary | D．On the other hand |
.Hawking became world-famous in _______.
| A．his thirties in the 1970’s |
| B．the thirties in his 1970 |
| C．his 30s in 1970’s |
| D．the thirties during the 1970 |
Jane’s pale face suggested that she ill, and her parents suggested that she medical examination.
| A．be; should have | B．was; have |
| C．should be; have | D．was; has |
—Waiter!
—
—I can’t eat this. It’s too salty.
| A．Yes, sir? | B．What? |
| C．All right? | D．Pardon? |
Children’s brains can’t develop properly_______ they lack protein(蛋白质).
| A．when | B．since | C．because | D．unless |