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
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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
单项选择题
You'd rather go to theater with him this evening, ______
A．are you
B．hadn’t you
C．isn’t it
D．wouldn’t you
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