---Was the proposal passed at yesterday’s meeting?
---Yes, but some members of the committee expressed__________.
A. association B. reservation
C. authority D. corporation
B
The natural environment should be protected because of the important role _______ plays in human survival and development.
A. which B. the one
C. it D. that
C
It may be necessary to stop__in the learning process and go back to the difficult points in the lessons.
A. at intervals B. at random
C. at ease D. at length
A
--What a pity! George ____well quit the trip to Hangzhou. --Let me phone him for the final decision.
A. can B. must
C. shall D. may
D
----Do you have any idea why Jenny left the firm?
---Probably , she _____ for a pay rise, but was turned down.
A. has held out B. holds out
C. held out D. has been holding out
C
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