单项选择题

His mother is going to stay in Beijing for ______.

A．some times
B．some time
C．sometime
D．sometimes
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单项选择题
Ann was not careful enough; ______ she wouldn't have made such a silly mistake.
A．nevertheless
B．however
C．otherwise
D．although
单项选择题
I ______ everything by the time you get back next month.
A．shall finish
B．will be finishing
C．have finished
D．shall have finished
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