1.a
2.c
3.a
4.a
5.d
6.d
7.a
8.b
9.a
10.d
11.b
12.c
13.a
14.d
15.d
16.b
17.c
18.d
II.
a.we didn't like the food so we walk out of the restaurant.
b.the place was beautiful so liz wanted to go there again.
c.every one was tired after the visit so they slept on the bus on the way home.
d.there was fog so the flight was delayed.
e.the hotel was noisy so they coudn't sleep.
III.
1.will take
2.have to
3.will finish
4.will wait
5.will take
6.will
7.will study
8. must hurry