单项选择题

______there was an epidemic approaching, Mr. Smith ______ the invitation to visit that area.

A．If he knew, would have declined
B．If he had known, would decline
C．Had he known, would decline
D．Had he known, would have declined
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The cargo box has a label ______ on it. Please handle it with care. A . flexible B. break C. fragile D. stiff
The cargo box has a label ______ on it. Please handle it with care. A . "flexible" B. "break" C. "fragile" D. "stiff"
单项选择题
British hopes of a gold medal in the Olympic Games suffered ______ yesterday, when Hunter failed to qualify during the preliminary heats.
A．a sharp set-back
B．severe set-back
C．a severe blown-up
D．sharp blown-up
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