1.closed
2.fell...was reading
3.have...seen
4.tells
5.not to talk
6.pick
7.gave
8.felt..ate
9.must be looked after
10.was set up
11.will learn
12.doesn't do
13.are
14.was seen
15.have studies
16.developing
17.is interested
18.walked
19.were planted
1.closed
2.fell...was reading
3.have...seen
4.tells
5.not to talk
6.pick
7.gave
8.felt..ate
9.must be looked after
10.was set up
11.will learn
12.doesn't do
13.are
14.was seen
15.have studies
16.developing...
B
A
B
B
B
C
A
C
还有第九第十这两个空是在哪?Sometimes I think animals in the zoo may want to go back to the forest.But I also think zoos are good places(9)animals.People give them(10),so they're not h...
动名词和现在分词都有完成时的被动式,形式完全相同,都是 having been done
eg .He felt reget for having been told the news .
Having been praised by the teacher ,he worked harder ....
这是一个倒装结构,强调so 引导的从句,所以助动词前移:So involved with their computers do the children become,原句是:The children become so involved with their computers that leaders at summer co...