单项选择题

"Where can I find Jim He is （） his work. He won't leave the lab until 6:00 p.m.

A．on
B．over
C．at
D．under

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单项选择题
We are （） with these experienced technicians.

A．too pleased to work
B．too pleased working
C．only too pleased to work
D．only too pleased working
单项选择题
The road is laid ahead of him, a （） gray line stretching to the horizon.

A．constant
B．repeated
C．continuous
D．wide
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