单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．Many sources of surface water have been found.
B．Chemicals were found in the water.
C．A growing population need more clean water in that place.
D．A bomb factory will be built there.
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单项选择题
A．It is good for improving muscle tone.B．It helps him lose weight.C．It helps develop mental toughness.D．It helps strengthen the heart.
A．It is good for improving muscle tone.
B．It helps him lose weight.
C．It helps develop mental toughness.
D．It helps strengthen the heart.
单项选择题
A．Farmers should use less insecticide:B．Farmers should use a combination of two or three insecticides at once.C．Farmers should attract new insects onto the crops certain times.D．Farmers should regularly spray crops as a precaution.
A．Farmers should use less insecticide:
B．Farmers should use a combination of two or three insecticides at once.
C．Farmers should attract new insects onto the crops certain times.
D．Farmers should regularly spray crops as a precaution.
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