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
Returning to the hotel, _______.
A．my watch was missing
B．I found my watch missed
C．I found my camera missing
D．my watch was missed
单项选择题
Dr.Johnson ______ the patient of the safety of the operations.
A．guaranteed
B．confirmed
C．assured
D．entrusted
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