单项选择题

A．In 1977.
B．In 1980.
C．In the early 1980s.
D．In 1985.
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单项选择题
A．They have accidents when they try to outrun other boats.B．They fall overboard when they stand up in their boat.C．They sit or lie on the bottom of their boat.D．They fall asleep and water enters their boat.
A．They have accidents when they try to outrun other boats.
B．They fall overboard when they stand up in their boat.
C．They sit or lie on the bottom of their boat.
D．They fall asleep and water enters their boat.
单项选择题
A．It is very economical.B．It gives a complicated system.C．It provides them with cheaper meals.D．It gives free lunch and dinner.
A．It is very economical.
B．It gives a complicated system.
C．It provides them with cheaper meals.
D．It gives free lunch and dinner.
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