单项选择题

Only when I watched TV last night ______ what ______.

A．I learned / was happening
B．did I learn / had happened
C．learned I / had happened
D．did I learn / would happen
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单项选择题
After three hours' mountain climbing, their legs ______ under them.
A．gave up
B．gave in
C．gave out
D．gave away
单项选择题
Our bank remains ______ 24 hours a day around a week.
A．open
B．opened
C．openly
D．opening
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