单项选择题

Rarely ______ such a terrible sight.

A．I have seen
B．have I seen
C．I saw
D．had I seen
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单项选择题
Such subjects ______ English, math and computer science are of vital importance to us.
A．as
B．like
C．alike
D．to
单项选择题
On seeing the expression in his face, we knew ______ was bad.
A．a news
B．some news
C．news
D．the news
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