单项选择题

This (equipment) is (based upon) advanced (techniques) and it is (highly reliable).

A．A
B．B
C．C
D．D
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单项选择题
(Comparing) with the weather (of) last winter, it is (much) milder and more pleas ant (this winter).
A．A
B．B
C．C
D．D
单项选择题
We should start at (once) and not waste (too) much time (to argue) (about) the procedure.
A．A
B．B
C．C
D．D
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