1 It

2 That

3 it

4 there

5 it

6 it

7 there

8 it

A C C A C B B B 

it

there

it

it

there

it

there

there

it

there

there

1,it
2,there
3, it
4, it
5, there
6, it
7,there
8,there

1 so

2 because

3 also

4 in case 

1 A

2 A

A

A

Ex1:
1. don't have
2. can't
3. didn't meet/ didn't remember
4. went/ got drunk
5. doesn't have
6. didn't go/ didn't wake
7. tall
8. didn't/ didn't
9. met
10. didn't call/ wasn't

1 If he hadn't drunk too much wine, he wouldn't have had a headache

2 If the cigarette hadn't been lit, the house wouldn't have been burned down

3 If she hadn't refused his invitation, he wouldn't have been upset 

4 If she had been tall enough, she could have played the game

5 If he had been at home, he could have answered the phone

6 If he hadn't eaten so much fast food, he wouldn't have been fat

7 If he had listened to his mother, he would have succeed

8 If he hadn't been late many times, he wouldn't have got tired