1． The book was written in 1946,_D___the education system has witnessed great changes.
A. When
B. During which
C. Since then
D. Since when
2. the last one __C__pays the meal.
Agreed!
A. arrived
B. arrives
C. to arrive
D. arriving
3.when asked why he went there, he said he was sent there__D___for a space flight.
A. training
B.being trained
C.to have trained
D.to be trained
4.as the light turned green, I stood for a moment, not_B___, and asked myself what I was going to do.
A.moved
B.moving
C.to move
D.being moved
5. _B___that she did not do a good job, I don`t think I am abler than her.
A.to have said
B.having said
C.to say
D.saying
6.the meaning of life __C__according to the nature of one`s lifestyle.
A.moves
Bchangs
Cvaries
Dturns
7.how are you getting on with your book ?
I have finished a large part of it . the rest _B___more difficult
Aare
Bis
Cwere
Dwas
9.all the speech competitors B____ remain in their own seats until the contest is over, according to the competition rule.
Amust
Bshall
10.we ara happy that our predictions _C___so accurate, which is far from expectation.
Amight be
Bwould be
Cshould be
Dwill be
11.in the park, the number of visitors is tightly __A__ to avoid damaging the environment or putting stress on the animals.
Alimited
Bencouraged
Cexpected
Dintended
12.professor smith , who __B__the research of wild animals all his life, __B__to give a speech in BJ University next week.
A.has devoted to ; is supposed
B.has been devoted to ; is supposed

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1． The book was written in 1946,_D___the education system has witnessed great changes.
A. When
B. During which
C. Since then
D. Since when
前面一句是一般过去时，后一句是现在完成时。所以是在说自从
1946年以来至现在教育体系经历了很大变化。when 引导定语从句代替1946年。
2. the last one __C__pays the meal.
Agreed!
A. arrived
B. arrives
C. to arrive
D. arriving
固定用法the first/second/last...+to do“第几个做某事的人”
3.when asked why he went there, he said he was sent there__D___for a space flight.
A. training
B.being trained
C.to have trained
D.to be trained
动词不定式作目的状语“为了接受训练”，不能用to have done结构，它常作宾语。
4.as the light turned green, I stood for a moment, not_B___, and asked myself what I was going to do.
A.moved
B.moving
C.to move
D.being moved
doing作伴随状语，伴随stood发生，“主动、正进行”。
5. _B___that she did not do a good job, I don`t think I am abler than her.
A.to have said
B.having said
C.to say
D.saying
前句did后句don't两个动作存在先后性，前一用having done
6.the meaning of life __C__according to the nature of one`s lifestyle.
A.moves
Bchangs
Cvaries
Dturns
四个词中只有varies能够表示“多样性”
7.how are you getting on with your book ?
I have finished a large part of it . the rest _B___more difficult
Aare
Bis
Cwere
Dwas
the rest 作主语，谓语动词单复数取决于它所修饰的名词的单复数。因为只有一本书，所以这里用单数。
9.all the speech competitors B____ remain in their own seats until the contest is over, according to the competition rule.
Amust
Bshall
shall可以在条约、规章、法令等文件中表示义务，或规定。一般用于第三人称，“应，必须”
10.we ara happy that our predictions _C___so accurate, which is far from expectation.
Amight be
Bwould be
Cshould be
Dwill be
通过far from expectation可知，出乎意料，所以用should,因为只有它有“竟然”的意思。
11.in the park, the number of visitors is tightly __A__ to avoid damaging the environment or putting stress on the animals.
Alimited
Bencouraged
Cexpected
Dintended
为防止破坏环境，游客人数被严格限制。B鼓励，C期待,D打算
12.professor smith , who __B__the research of wild animals all his life, __B__to give a speech in BJ University next week.
A.has devoted to ; is supposed
B.has been devoted to ; is supposed
devote oneself to=sb be devoted to 选项A后没有himself