单项选择题

I'll be very glad that you agree to ______ this matter.

A. look up
B. look for
C. look over
D. look into
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单项选择题
The problem is believed ______ at the meeting two days ago.
A. to have discussed
B. to have been discussed
C. being discussed
D. having been discussed
单项选择题
The international situation has been growing ______ difficult for the last few years.
A. invariably
B. presumably
C. increasingly
D. dominantly
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