. Jane Goodall with her assistants ______ for the forests to learn more about th

题型：不详难度：来源：

. Jane Goodall with her assistants ______ for the forests to learn more about the chimps.

A．are setting off

B．is setting off

C．have set off

D．sets off

答案

解析

略

举一反三

His daughter was disabled after a serious illness in 2003 and in the last seven years, he
money to help those children like his daughter.

A．has raised

B．has been raising

C．had raised

D．was raising

题型：不详难度：| 查看答案

With the rapid growth of population, the city______ in all directions in the past five years.

A．spreads

B．has spread

C．spread

D．had spread

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. By the year 2020 scientists _____ a lot of research on AIDS.

A．had done

B．do

C．are doing

D．will have done

题型：不详难度：| 查看答案

But for the fact that the firefighters _____ at the spot in time, more people ______ their lives in the fire.

A．arrived; died	B．had arrived; would lose
C．arrived; would have lost	D．has arrived; could have lost

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I ________ to help you with your homework, but I couldn’t spare any time. I ________ a composition last night and I’ll finish it today.

A．wanted; wrote	B．had wanted; was writing
C．have wanted; wrote	D．wanted; have been writing

题型：不详难度：| 查看答案