单项选择题

It's freezing outside; you'd better _________ black ice when you drive home.

A．look down on
B．check up on
C．watch out for
D．keep out
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单项选择题
Everyone knew that _________ the project would be completed and we'd all have to return to our own separate departments.
A． primarily
B．ultimately
C．eventfully
D．precisely
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