单项选择题

21()

A.when
B.because
C.where
D.how

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单项选择题

All the students in this class passed the English exam () the exception of Li Ming.

A. on
B. in
C. for
D. with

单项选择题

The traditional approach () with complex problems is to break them down into smaller, more easily managed problems.

A. to dealing
B. in dealing
C. dealing
D. to deal

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