单项选择题

I'd ______ the operation unless it is absolutely necessary.

A．rather not have
B．rather not to have
C．not rather had
D．rather not having
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单项选择题
The first textbooks for teaching English as a foreign language came out in the 16th century.
A．having written
B．to be written
C．being written
D．written
单项选择题
______the news of his father's death, he burst into tears.
A．After hearing
B．On hearing
C．Having heard
D．While hearing
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