单项选择题

Questions 6 and 7 are based on the following news. According to news, the West Virginia coal mine disaster

A．caused minor injuries.
B．was the worst one since 1984.
C．was caused by terrorist attack.
D．happened in early mornin
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单项选择题
The rescue operation has stopped temporarily because
A．the weather was bad.
B．there was risk of another blast.
C．there was another blast.
D．no survivor has been foun
单项选择题
Heavy babies tend to
A．be overweight.
B．be healthier.
C．be thinner later in life.
D．get mental diseases.
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