单项选择题

(New uses) for plastics (were found) during (the) 1950’s and 1960’s in medicine, space, research, (industrial), and architecture.（）

A.New uses
B.were found
C.the
D.industrial

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单项选择题

To (people) from the northern parts of the country, (tropical) butterflies (may) seem (incredible) big.（）

A.people
B.tropical
C.may
D.incredible

单项选择题

On the one hand, the turkey vulture(秃鹫) (disgusts people) because of (its) eating habits. (On the contrary), it fills a useful role by (consuming) the flesh of dead animals.（）

A.disgusts people
B.its
C.On the contrary
D.consuming

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