单项选择题

(That) troubles me is (that) I can't learn (all these) English idioms (by heart).

A．That
B．that
C．all these
D．by heart
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单项选择题
The new factory is ______ several hundred cars a week.
A．turning in
B．turning off
C．turning out
D．turning on
单项选择题
Although London is a large city , it is not ______ crime—rid den as New York City.
A．as
B．for
C．such
D．same
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