单项选择题

A．He failed to attend the salon the day before.
B．He fell down the steps when he walked.
C．He had an operation on his knees.
D．He knocked the woman down while walking.
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单项选择题
A．crackB．blankC．breakD．opening
A．crack
B．blank
C．break
D．opening
单项选择题
In the eyes of Professor Morris, loan words are ______.
A．goods imported from other countries
B．acknowledged by people using them
C．lent to English people without interest
D．widely used especially in scientific field
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