单项选择题

There’s a lot of public （）about dangerous toxins recently found in food.

A.conflict
B.conduct
C.concept
D.concern

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单项选择题

You can’t expect to have any friends if you don’t （）any effort with people.

A.do
B.take
C.make
D.have

单项选择题

—（）？—She’s our history teacher.

A.What’s she
B.Where does the woman work
C.Who is she
D.How is the woman