19. They________a lot of suggestions for improving the workers’ living conditions.
| A．put out | B．put forward | C．put on | D．put in |
We are all____ of the poem “Children, quickly, hold mother’s hands” and moved by it.
| A．tired | B．afraid | C．fond | D．confident |
Scientists say it may be five or six years_______it is possible to test this medicine on human patients.
| A．when | B．after | C．before | D．since |
You have to ____smoking. It isn’t good for your health.
| A．give up | B．give off | C．give in | D．give away |
---Must he remember everything he has learned in the class?
---No, he _____.
| A．can’t | B．may not | C．mustn’t | D．needn’t |
---“Don’t read in bed.”
--- What did he said?
---He told us _____read in bed.
| A．not to | B．not | C．don’t | D．didn’t |