单项选择题

A．They will be much bigger.
B．They will have more seats.
C．They will have three wheels.
D．They will need intelligent drivers.
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单项选择题
A．About 45 million.B．About 50 million.C．About 5.4 million.D．About 4.5 million.
A．About 45 million.
B．About 50 million.
C．About 5.4 million.
D．About 4.5 million.
单项选择题
A．They published scientific evidence to determine second hand smoke as a cause of cancer.B．They denied the suspicion that second hand smoke may cause cancer.C．They discovered all the causes of cancer.D．They agreed that moderate smoke won’’t cause cancer.
A．They published scientific evidence to determine second hand smoke as a cause of cancer.
B．They denied the suspicion that second hand smoke may cause cancer.
C．They discovered all the causes of cancer.
D．They agreed that moderate smoke won’’t cause cancer.
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