单项选择题

A．A hotel.
B．A supermarket.
C．A city store.
D．A fast food restaurant.
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单项选择题
A．Because he was never afraid of anything.B．Because he was protected by a special medium.C．Because he had enough experience.D．Because it was his job.
A．Because he was never afraid of anything.
B．Because he was protected by a special medium.
C．Because he had enough experience.
D．Because it was his job.
单项选择题
The passage centers on the controversy ________
A．between American and New Zealand biologists over genetic modification
B．as to whether the study of genetic modification should be continued
C．over the possible adverse effect of a GM bacterium on plants
D．about whether Elaine Ingham should be fired by her university
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