12. Having finished their morning work, the clerks stood up behind their desks, ________ themselves.
| A．expanding | B．extending | C．expressing | D．Stretching |
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The retired man donated most of his savings to the school damaged by the ea
rthquake in Yushu ,the students to return to their classrooms.
| A． | enabling | B． | having enabled | C． | to enable | D． | to have enabled |
----Do you think their table tennis team will win the first place at the coming Asian Games?
----.Ours is much stronger than theirs.
| A． | Of course | B． | It depends | C． | Don't mention it | D． | By no me  ans |
The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.
| A．found out | B．pointed out | C．ruled out | D．carried out |
---I haven't got the reference book yet, but I'll have a test on the subject next month.
---Don't worry. Youhave it by Friday.
| A． | could | B． | shall | C． | must | D． | may |
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