单项选择题

The Committee pronounced four members expelled for failure to provide information in the ______ of investigations.

A．case
B．chase
C．cause
D．course
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单项选择题
He did not tell his parents because he knew they would try to change his mind but he ______ in a colleague at work.
A．involved
B．joined
C．engrossed
D．confided
单项选择题
Pupils often want to sit next to their particular friend and many classroom activities involve moving about, but even relatively small alterations can make ______ to the visual comfort of pupils with sight defects.
A．a difference
B．an interference
C．a modification
D．an impact
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