grammar revision

现在完成进行时用于以下哪种情况

• 1.突出时长

  2.突出动作

• 过去开始并持续一段时间的事，但过去已经结束了

• 1.过去开始并持续一段时间的事
  2.现在已经结束了

There ___ no store in my school three year ago.

•  were

•  was

• is

This book must be great. My sister ____ it five times.

• have been reading

• has read

• is reading

• was reading

The young man couldn't afford the phone because he ____ all his money on the clothes.

• will spend

• spends

• was spending

• has spent

 My sister________ homework when the telephone rang.

•  does

• did

• is doing

• was doing

Mary didn't answer my call because she _____ at 3 p.m. yesterday.

• swam

•  swims

• is swimming

• was swimming

When she entered the police station, she recognized the man who          her at once.

• was attacking

•  attacked

• would attack

• had attacked

I wonder why Jenny _____to us recently. We should have heard from her by now.

• hasn't been writing

•  doesn't write

• won't write

•  hadn't written

 The little boy is dirty all over because he ________ in the mud all the morning. 

• had played

• have been playing

• is playing

• plays

If Mary ________ free tomorrow, I will ask Tom instead.

• doesn’t

• won’t be

• is

• isn’t