单项选择题

I wonder who first (conceived) the idea of cutting a hole in the door.

A．thought of
B．came on
C．gave up
D．handed out
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单项选择题
If wool is put into hot water, it tends to (shrink).
A．smell
B．fade
C．harden
D．contract
单项选择题
The train came to an (abrupt) stop, making us wonder where we were.
A．slow
B．noisy
C．sudden
D．jumpy
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