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请分析与解答.16.Selecting a mobile phone for personal use is no ea

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请分析与解答.
16.Selecting a mobile phone for personal use is no easy task because technology _______ so rapidly.
A.is changing B.has changed
C.will have changed D.will change
17.I _______ ping-pong quite well,but I haven’t had time to play since the new year.
A.will play B.have played C.played D.play
18.I wonder why Jenny _______ us recently.We should have heard from her by now.
A.hasn’t written B.doesn’t write
C.won’t write D.hadn’t written
19.—You haven’t said a word about my new coat,Brenda.Do you like it?
—I’m sorry I _______ anything about it sooner.I certainly think it’s pretty on you.
A.wasn’t saying B.don’t say C.won’t say D.didn’t say
20.All morning as she waited for the medical report from the doctor,her nervousness _______.
A.has grown B.is growing C.grew D.had grown
1A
2D 会打乒乓算是客观事实了
3A 到现在为止
4D 意思是,我很抱歉我没有一开始就说,我认为你穿着它很漂亮
5时间状语从句中关键词语All morning和waited预示着主句动词表示:过去某时间段中发生了或者发生着某事,应用一般过去时或过去进行时.答案为C