AlandingonMarsiswithintheofcur

A landing on Mars is within the _____ of current physical theory.

A．scheme

B．scope

C．scrap

D．scale

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The two friends _____ on the Internet for three hours, and they would go on till the next morning.

A．had been chatting

B．had chatted

C．were chatting

D．has been chatting

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— It is around 100 years, known to us all, ______ the first modern Olympic Games was held.
— It really is. But were _____ ?

A．that; was that

B．since; was it

C．after; is that

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Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

A．will teach

B．would have taught

C．has been teaching

D．will have been teaching

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— Thank you.

A．didn’t know

B．don’t know

C．haven’t known

D．hadn’t known

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Tom’s father had not spoken to him since his marriage, because he considered Tom ______ a mistake in marrying so young a girl.

A．had made

B．made

C．would make

D．was making

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