5.-The light in his office is still on.Do you know _______?
-To prepare for the material(材料) the meeting will need tomorrow,I think.( )
-To prepare for the material(材料) the meeting will need tomorrow,I think.( )
| A. | if he works hard | B. | why he stays up so late | ||
| C. | why is he so busy | D. | when he will stop working |
4.-Look,the old man is walking slowly in the middle of the street.It's too dangerous.
-You're right.Let's go and help him go ______ the street.( )
-You're right.Let's go and help him go ______ the street.( )
| A. | across | B. | through | C. | over | D. | along |
3.Carol,there was a phone call for you.It was a girl's .( )
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| A. | sound | B. | answer | C. | voice | D. | noise |