单项选择题

I'm sure your suggestion will ______ the problem.

A．contribute to solving
B．be contributed to solve
C．contribute to solve
D．be contributed to solving
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单项选择题
My pain ______ apparent the moment I walked into the room, for the first man I met asked sympathetically: Are you feeling all right
A．must be
B．must have been
C．had been
D．had to be
单项选择题
No one would have time to read or listen to an account of everything ______ going on in the world.
A．it is
B．as is
C．there is
D．what is
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