单项选择题


Passage Two
What is mentioned as one of the suggestions raised by scientists

A．Using less insecticide.
B．Giving the plants up.
C．Spraying crops frequently.
D．Trying other insecticide.
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单项选择题
Why has not the woman seen her parents for the last couple of years
A．Her home is too far away from her university.
B．Her parents have been volunteering in South America.
C．She is too busy to go back home visiting her parents.
D．She has to take a part-time job during vacations.
单项选择题
what do we know about Kahn’s factories according to the conversation
A．They were inefficient.
B．They had wooden frames.
C．They were spacious and airy.
D．They didn’t provide enough light.
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