单项选择题

This is the best way I have thought of（）the problem.

A.to solve
B.solving
C.to be solving
D.solves

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单项选择题

I（）her（）her sister because they are so alike.

A.made； confused
B.confused； by
C.confused； to
D.confused；with

单项选择题

As is known to us all，sea water（）salt.

A.includes
B.contains
C.including
D.containing

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