单项选择题

If the letter (to be mailed) was placed on the (writing) table an hour (ago), it is certain (will be) there now.

A. to be mailed
B. writing
C. ago
D. will be
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单项选择题
Children may not enjoy (to eat) sweets after a meal (so much as) (at) other times, but it is healthier for them (to do) so.
A. to eat
B. so much as
C. at
D. to do
单项选择题
Although we tried to concentrate on the lecture, we were ______ by the noise from the next room.
A．distracted
B．displaced
C．dispersed
D．discarded
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