单项选择题

Factory workers (had to) work (very hard) before, (so) (had farmers).

A．had to
B．very had
C．so
D．had farmers
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单项选择题
We (are) all (for) your proposal (that) the discussion (is to be put off).
A．are
B．for
C．that
D．is to be put off
单项选择题
While (shopping), people sometimes can’t help (persuading) into (buying) something they don’t really (need).
A．shopping
B．persuading
C．buying
D．need
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