题目：
用括号内所给动词的适当形式填空。
小题1:In the past three years, my home town ______________(change) a lot. already.
小题2:It’s hard to say what ____________ (happen) in 100 years in our country.
小题3:They_______________(not travel)to Shanghai next week, are they?
小题4:The students________(chat) from 6 to7 yesterday evening.
小题5:When I got to the station yesterday morning, my friends _______(wait ) for me at the entrance.
小题6:If it__________ (not rain) tomorrow, we’ll go hiking.
小题7:He____________ (not write) a letter to his mother yet. He has to do that soon. His mother misses him very much.
小题8:Would you please__________(not make) such a big noise. The baby is sleeping.
小题9:It’s a long time since we ________(meet) last time, isn’t it?
小题10:----How many times _______the girl __________(forget) to take the keys to her home?
----At least three times.
小题11:You must spend as much time as you can ________ (practise) playing the piano.
小题12:They_______(live) in Wuxi since they were born.
答案：
小题1:has changed
小题2:will happen
小题3:aren’t going to travel
小题4:were chatting
小题5:were waiting
小题6:doesn’t rain
小题7:hasn’t written
小题8:not make
小题9:met
小题10:has---forgotten
小题11:practicing
小题12:have lived
小题1:考查时态。In the past three years“在过去的三年里”，in加一段时间，与现在完成时连用。故填has changed。
小题2:考查时态。in 100 years“100年后”，in加一段时间，与现在完成时连用。故填will happen。
小题3:考查时态和反意疑问句。根据are they可知，主句是否定，且用be going to表示将来。故填aren’t going to travel。
小题4:考查时态。from 6 to7 yesterday evening“昨晚6-7点”，过去某时间点正在发生的事情，用过去进行时。故填were chatting。
小题5:考查时态。过去某时间点正在发生的事情，用过去进行时。故填were waiting。
小题6:考查if条件句。if“如果”，引导条件句，用现在时代替将来时。故填doesn’t rain。
小题7:考查时态。根据yet可知，应该用现在完成时的否定。故填hasn’t written。
小题8:考查固定句型。Please后加动词原形，否定在please后加not。故填not make。
小题9:考查时态。since从句用一般过去时。故填met。
小题10:考查固定句型。It is+数词+times+含有现在完成时的that从句，“第几次做某事”。故填has---forgotten。
小题11:考查固定搭配。spend time doing sth“花时间做某事”，as much time as you can “尽可能多的时间”。故填practicing。
小题12:考查时态。since从句常与现在完成时连用。故填have lived。
