单项选择题

The police officer has begun to ______ the case.

A. look out
B. look into
C. look on
D. look over
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单项选择题
This term the students have learned ______ last term.
A. twice as many new words as
B. as many new words twice as
C. twice as much new words as
D. twice as more new words as
单项选择题
Mary never tells anyone else what she does for a ______ .
A. job
B. work

C. living
D. life
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