单项选择题

By my 50^th birthday, I ______ in my current profession for over 20 years.

A．would have been
B．would be
C．will be
D．will have been

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单项选择题

It is no good ______ English without speaking English.

A．to learn
B．learn
C．learning
D．learned

单项选择题

I've already decided. I ______ buy a new car.

A．am going to
B．will
C．would
D．have bought

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