单项选择题

Jack ______ yet, otherwise he would have telephoned me.

A. mustn't have arrived
B. shouldn't have arrived
C. can't have arrived
D. need not have arrived
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Make hay ______ the sun shines.
A) while
B) when
C) if
D) and
单项选择题
______the news, Ida changed her plans. A) In hearing B) To hear C) Of hearing D) On bearing
______the news, Ida changed her plans.
A) In hearing B) To hear
C) Of hearing D) On bearing
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