单项选择题

A．To see what happened to the survivors of the disease.
B．To study animals that can also get infected with the disease.
C．To look for the plants that could cure the disease.
D．To look for the plants that could cure the disease.
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单项选择题
A．She’’s got a stomachache.B．She feels perfectly fine.C．She’’s going to get married.D．She’’s going to have a baby.
A．She’’s got a stomachache.
B．She feels perfectly fine.
C．She’’s going to get married.
D．She’’s going to have a baby.
单项选择题
A．They were influenced by his background in engineering.B．They were very expensive to take.C．They were among the first taken under such condition.D．Most of them were of poor quality.
A．They were influenced by his background in engineering.
B．They were very expensive to take.
C．They were among the first taken under such condition.
D．Most of them were of poor quality.
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