1.Anne couldn't concentrate____ what she was doing while her family were watching TV.
A) to B) for C)on D)in
答案：C concentrate on 聚精会神于，集中思想于。
2.We place the highest value____ our friendly relations with developing countries.
A)on B)to C)for D)with
答案：A place/put value on 重视, He puts/places little value on qualifications.
3.In the experiment we kept a watchful eye____ the developments and recorded every detail.
A)in B)at C)for D)on
答案：D keep an eye on 注意，留心瞧着。
4.In recent years much more emphasis has been put____developing the students’ productive skills.
A) over B)onto C)in D)on
答案：D put/place/lay emphasis on/upon sth. 强调，着重。
5.There is an incorrect assumption among scientists and medical people that everyone agrees ____what constitutes a benefit to an individual.
A)on B)with C)to D)in
答案：A agree on 就……取得一致意见，在……方面意见一致。agree with 同意某人的意见。agree to sth. 同意(某一建议、安排等)。Agree in 赞同，一致。
6.Although I had been invited to the opening ceremony, I was unable to attend____ such short notice.
A) to B)in C)with D)on
答案：D on/at a moment’s/(a) short notice 只提前一会儿通知/只给很少的准备时间：Essex had undertaken this mission at a few hours'notice.
7.Can I ____to this book for another week.
A) hold back B) hold off C) hold over D) hold on
答案：D hold on 坚持，符合题意。
8.The persons who have the greatest influence ____ children are their teachers.
A)in B)on C)for D)to
答案：B have influence on/over/with sb. [可加不定冠词]对……有影响。
9.He was released on bail _____ that he did not made any attempt to see her.
A) on condition B) if C)unless D)as long as
答案：A on condition that =as long as 只要
10.The young tree could not have been damaged by accident. I believe it was done____.
A) in fact B) on purpose C) by appointment D) by plan
答案：B on purpose 故意的。in fact 事实上。By appointment 按约。by plan 按计划。
