单项选择题

During their first teacher-training year, the students often visited local schools for the ______ of lessons.

A．investigation
B．observation
C．inspection
D．examination
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单项选择题
She watched him ______ all the handles and gears in his automobile until she thought she could run it herself.
A．manipulate
B．use
C．control
D．dominate
单项选择题
His ______ personality, rather than his good looks, made him popular with others.
A．enlisting
B．enduring
C．engaging
D．enhancing
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