单项选择题

He ______ so much work that he couldn't really do it efficiently.

A．put on
B．turned on
C．brought on
D．took on

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单项选择题

While some office jobs would seem ______ to many people, there are quite a few jobs that are stimulating, exciting and satisfying.

A．hostile
B．tedious
C．fantastic
D．courageous

单项选择题

There is much I enjoy about the changing seasons, but my favorite time is the ______ from fall to winter.

A．transmission
B．transformation
C．transition
D．transfer

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