单项选择题

Investigators agreed that passengers on the airliner______ at the very moment of the crash.

A．should have died
B．must be dying
C．must have died
D．ought to die
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单项选择题
I have never been to London, but that is the city_________.
A．where I like to visit most
B．I’’d most like to visit
C．which I like to visit mostly
D．where I’’d like most to visit
单项选择题
Where can I find Jim He is ______ his work. He won’’ t leave the lab until 6:00 p. m.
A．on
B．over
C．at
D．under
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