单项选择题

______, I must do another experiment.

A．Be it ever so late
B．It is ever so late
C．It be ever so late
D．So late it be ever
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单项选择题
On turning the corner, we saw the road ______steeply.
A．departing
B．descending
C．decreasing
D．depressing
单项选择题
To survive in the intense trade competition between countries, we must______ the qualities and varieties of products we make to the world-market demand.
A．improve
B．enhance
C．guarantee
D．gear
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