单项选择题

A．Farming implements.
B．Scientific farming methods.
C．Heat resistant and drought-resistant crops.
D．Scientific farming system.
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单项选择题
A．It becomes bigger.B．It becomes more expensive.C．It becomes cheaper.D．It becomes much safer.
A．It becomes bigger.
B．It becomes more expensive.
C．It becomes cheaper.
D．It becomes much safer.
单项选择题
A．He read the newspaper.B．One of his students told him.C．He attended a cabinet meeting.D．He listened to the radio report.
A．He read the newspaper.
B．One of his students told him.
C．He attended a cabinet meeting.
D．He listened to the radio report.
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