单项选择题

The children were (surprised) when the teacher (had them) (to close) their books (unexpectedly).

A．surprised
B．had them
C．to close
D．unexpectedly
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单项选择题
The (secretary) and principal (of) (the school) (were) present at the meeting.
A．secretary
B．of
C．the school
D．were
单项选择题
(If I had been you), I (would not) refuse (his) (invitation).
A．If I had been you
B．would not
C．his
D．invitation
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