1 . haven't seen
2 . has called
3 . has read
4 . haven't begun
5 . have met
6 . has been
7 . has taken
8 . did .... give up
9 . Have you washed ?
10 . collected
11 . moved
12 . has been
13 . have gone
14 . spent
15 . heard
16 . is
17 . Have you finished
18 . will go
II)
1. They / visited / Ha Long Bay / many times.
..........They have visited Ha Long Bay for many times...............................
2. My brother / not like / ice - skating / because he thinks / it / dangerous.
......My brother doesn't like ice - skating because he thinkss it is dangerous......................
3.We/already/ask/people/donate/books/clothes/children.
........We have already asked people for donating books and clothes for children......
4.I/not like/eat/junk food/because/it/not be/good/my health.
.........I do not like eating junk food because it is not good for my health..............