单项选择题

It is useless () about this point now.

A. arguing
B. to arguing
C. to be argued
D. to argue

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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
D. to catch
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Nancy had (a great deal of) trouble (to concentrate on) her work (because of) the noise (in) the next room.()

A. a great deal of
B. to concentrate on
C. because of
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