单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．It is not easy to see the shortage of experts in the villages.
B．Many doctors and engineers are sent to the villages to make up for the shortage of experts.
C．Expert medical systems are widely used in developing countries.
D．Expert systems are owned by wealthy farmers and businessmen.
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单项选择题
A．The summer has been unusually hot.B．The man’s air conditioner is broken.C．The man hasn’t used his air conditioner.D．The man doesn’t have air conditioning.
A．The summer has been unusually hot.
B．The man’s air conditioner is broken.
C．The man hasn’t used his air conditioner.
D．The man doesn’t have air conditioning.
单项选择题
A．By selling services that make life comfortable.B．By selling land containing oil.C．By selling public lands.D．By selling coal and other natural products.
A．By selling services that make life comfortable.
B．By selling land containing oil.
C．By selling public lands.
D．By selling coal and other natural products.
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