单项选择题

You ______ that letter to James. However, you didn't.

A．ought to write
B．ought to have written
C．should write
D．should be writing
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单项选择题
Mary will not be able to come to the birthday party as she is ______ with a cold.
A．laid out
B．laid up
C．laid by
D．laid down
单项选择题
That fellow ______ at long distance running.
A．excels
B．exceeds
C．surpasses
D．overtakes
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