单项选择题

She liked to stay at home. She had previously traveled seldom and then only ______.

A．When necessary
B．which necessary
C．what possible
D．while possible
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单项选择题
Little ______ about his own safety, though he was in great danger himself.
A．does he care
B．did he care
C．he cared
D．he cares
单项选择题
It ______ that he was a fluent speaker of English, many people came to him to learn spoken English.
A．being known
B．was known
C．is known
D．had been known
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