21.Much (B) to fight against pollution.A.have been done B.has been done C.had done D.has done 25.Not only I but also Mary and John (D) interested in that film.A.am B.is C.be D.are 28.Some (B) sports ,others like music.A.likes B.like C.liked D.is liki

21.Much (B) to fight against pollution.A.have been done B.has been done C.had done D.has done 25.Not only I but also Mary and John (D) interested in that film.A.am B.is C.be D.are 28.Some (B) sports ,others like music.A.likes B.like C.liked D.is liki
21.Much (B) to fight against pollution.
A.have been done B.has been done
C.had done D.has done
25.Not only I but also Mary and John (D) interested in that film.
A.am B.is C.be D.are
28.Some (B) sports ,others like music.
A.likes B.like C.liked D.is liking
29.Some of the time (C) already passed.
A.have B.have been C.has D.has been
30.A great deal of money (D) spent on books.
A.has B.have C.have been D.has been
35.--Why couldn't they meey us at five o'clock?
--Because they were delayed by (B).
A.a heavy traffic B.heavy traffic
C.some heavy traffic D.heavy traffics
36.It is good (B) to thank the person who has done you a favor.
A.manner B.manners C.action D.actions
(相约 Page 29)

21.Much (B) to fight against pollution.A.have been done B.has been done C.had done D.has done 25.Not only I but also Mary and John (D) interested in that film.A.am B.is C.be D.are 28.Some (B) sports ,others like music.A.likes B.like C.liked D.is liki
21.Much (B) to fight against pollution.
A.have been done B.has been done
C.had done D.has done
much为不定代词,不可数,后面的谓语一般用单数.
25.Not only I but also Mary and John (D) interested in that film.
A.am B.is C.be D.are
not only .but also..的结构作主语,谓语动词一般采就近原则mary and john是复数,因此用are
28.Some (B) sports ,others like music.
A.likes B.like C.liked D.is liking
some还是不定代词,指代some people,为复数,用like
29.Some of the time (C) already passed.
A.have B.have been C.has D.has been
中心词是time时间,为不可数,因此还是用单数
30.A great deal of money (D) spent on books.
A.has B.have C.have been D.has been
money为不可数,用单数,money和spend是被动关系,因此用被动态.
35.--Why couldn't they meey us at five o'clock?
--Because they were delayed by (B).
A.a heavy traffic B.heavy traffic
C.some heavy traffic D.heavy traffics
traffic交通,还是不可数.
36.It is good (B) to thank the person who has done you a favor.
A.manner B.manners C.action D.actions
manners礼仪礼貌.

21. much不可数，用单数
25. 随but后面的跟
28.some=some people，很明显，复数
29. time这里指时间，不可数，time pass用主动
30. money 不可数
35. traffic这里指交通状况，不可数，固定用法
36. manners加s指礼貌， 用法和means一样，指手段

21.much不可数,所以用has,加上此句为,被动所以用been。
25.在but also后面是两个人。这里不是就近原则。
28.some代表的是一些人，所以不用likes,因为是一种喜好,所以是like.不是is liking.
29.时间距离不用于被动。加上time不可数。
30.money不可数,此句为被动语态。
35.heavy traffic为...

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21.much不可数,所以用has,加上此句为,被动所以用been。
25.在but also后面是两个人。这里不是就近原则。
28.some代表的是一些人，所以不用likes,因为是一种喜好,所以是like.不是is liking.
29.时间距离不用于被动。加上time不可数。
30.money不可数,此句为被动语态。
35.heavy traffic为特定的名词。
36.manners在这里表示礼貌。并不是manner的复数。作为整体来用。

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