单项选择题

He ______ reading silently at first.

A. used not to

B. didn’t use to
C. was not used to

D. is not used
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(There) are (thousand) of (different) types (of) roses.
A．there
B．thousand
C．different
D．of
单项选择题
There was nothing they could do ______
A. but to wait

B. only to wait
C. but wait

D. unless they waited
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