单项选择题

Passage One What do the inventors suggest the new video camera system can do

A．It can help catch stolen cars.
B．It can package food.
C．It makes cars run faster.
D．It gives information to the drivers.
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单项选择题
What is the most surprising suggestion scientists give
A．Changing the way of spraying crops.
B．Buying some outdoor insect lamps.
C．Using a combination of three insecticide.
D．Trying to attract new insects onto the crops.
单项选择题
what changes did the reinforced concrete bring to the architecture industry
A．It made the buildings solid and fireproof.
B．It decreased workers’ labor intensity.
C．It shortened the construction period.
D．It beautified the outlook of the buildings.
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