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
The poetry of Ezra pound is sometimes difficult to understand because it contains so many ______ references.
A．obscure
B．acute
C．notable
D．objective
单项选择题
International ______ should be reduced when this agreement is signed.
A．
A. pressure

B．
B. nervousness

C．
C. tension D strain
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