题目内容

He dropped the plate,____________ it into pieces.

A. to break
B. having broken
C. breaking

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Who had the greatest influence on Carson’s life?

A. )her brother
B. )her father
C. )her mother

What was her major in Pennsylvania College for Women?

A. )English
B. ) science
C. )biology

What happened to many songbirds and harmless insects after the application of DDT?

A. )They died.
B. )They ate the mosquitoes in the area.
C. )They increased in great number.

When did pesticides become widely used in the United States?

A. )After WWI.
B. ) After WWII.
C. )Before WWII.

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