单项选择题

（）he was seriously ill, I wouldn't have told him the troth.

A．If I knew
B．If I know
C．Had I known
D．Did I know

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单项选择题
What is essential for people to stand pain according to the writer（）

A．Their relaxation.
B．Their interest.
C．Their nerves.
D．Their attitude.
单项选择题
When the author mentions the Indian fakir, he shows that（）.

A．fakirs possess magic power
B．Indians are not afraid of pain
C．people can learn to cope with pain
D．some people are born without a sense of pain
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