单项选择题

The development of industry has (also) brought (about) large numbers of problems (which) have (to solve).

A．also
B．about
C．which
D．to solve
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Neither John (and) his father was able (to wake up) (early enough) (to catch) the morning train.
A．and
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C．early enough
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(At) no time and under no circumstances (China will) be (the first) (to use) nuclear weapons.
A．At
B．China will
C．the first
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