单项选择题

Seldom（）any mistake during his past ten years of service there.

A．did he make
B．he made
C．he makes
D．he did make

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单项选择题

There are forty students in our class.（）of them are League members.

A．No one
B．All
C．Both
D．Neither

单项选择题

By the end of this year, they（）the construction of the subway.

A．will complete
B．will have completed
C．have complete
D．complete

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