“It's shame that the city official should have gone back on his word." The modal auxiliary SHOULD expresses _____.
A. obligation
B. disappointment
C. future in the past
D. tentativeness
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She allowed the receptionist down a luxurious corridor to a closed door, _____ the woman gave a quick knock before opening it.
A. on which
B. but when
C. wherein
D. Then
Success is not ___ much as in luck as in hard work.
A. as
B. such
C. like
D. so
The whole country was in ___ over the result of the elections.
A. suspension
B. suspense
C. suspending
D. Suspender
The operation could ___ her life by two or three years.
A. prolong
B. increase
C. expand
D. combined