---When did Kate’s grandma die? ---While the doctors______ on her.A．are operatin

题型：不详难度：来源：

---When did Kate’s grandma die?
---While the doctors______ on her.

A．are operating

B．were operating

C．operate

D．operated

答案

解析

略

举一反三

---Who are you looking for?
---Mr White.
---Wait here for a while. The class meeting_______ over in half an hour.

A．is

B．will be

C．was

D．has been

题型：不详难度：| 查看答案

I don’t want to speak to her, but I ______.

A．do

B．have to

C．have to speak

D．must to

题型：不详难度：| 查看答案

The new library ____ next week.

A．will build

B．will be built

C．would build

D．would be built

题型：不详难度：| 查看答案

---Where’s Mabel?
---She _____ ping pong behind the teaching building.

A．is playing

B．was playing

C．played

D．had played

题型：不详难度：| 查看答案

Quite a few tall buildings _______ the last two years.

A．have been put up

B．were put up

C．had put up

D．put up

题型：不详难度：| 查看答案