单项选择题

Not until the early years of the 19th century ______what heat is.

A．man did know
B．man know
C．didn't man know
D．did man know
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单项选择题
The weather in China is different from______.
A．in America
B．one in America
C．America
D．that in America
单项选择题
—Do you know Jim quarrelled with his brother —I don't know, ______.
A．nor don't I care
B．nor do I care
C．I don't care neither
D．I don't care also
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