单项选择题

Not until I began to work （） how much time I had wasted.

A．didn't I realize
B．did I realize
C．I didn't realize
D．I realize

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单项选择题
He doesn't act （） Tom （）.

A．as half strangely as
B．so half strangely as
C．half strangely as
D．half so strangely as
单项选择题
Tom ought not to （） me your secret, but he meant no harm.

A．have told
B．tell
C．be telling
D．having told
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