单项选择题

Though it was late in the night, ______ he continued to work vigorously.

A. but
B. yet
C. and
D. that
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单项选择题
One of the most spectacular qualities of man is notably his ______ to any kind of natural environment.
A. tendency
B. adoptability
C. adaptability
D. availability
单项选择题
The train ______ at the present speed until it reaches the next city at about seven o'clock this evening.
A. will be going
B. went
C. would go
D. went
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