SB:U4:-EX21

C – a hot-air balloon hanging from a tree branch?
A - someone climbing into a hot-air balloon basket?
B – a bright flash of lightning?
D – a fire engine?

SB:U4:-EX20

a. 1) was staring 2) was 3) was travelling 4) entered 5) was wearing 6) was carrying 7) sat 8) opened 9) took 10) gave
b. 11) got 12) put 13) walked 14) was waiting 15) thought

SB:U4:-EX19

1. Ann wasn’t eating in apple. She was cutting the grass.
2. Sue wasn’t watering the flowers. She was eating an apple.
3. Jane and Mary weren’t cutting the grass. They were watering the flowers.
4. Bob wasn’t painting the door. He wasn’t hanging out the washing.

SB:U4:-EX18

At 8.30am last Monday I was having breakfast.
At the same time last Sunday I was sleeping.
At 11am last Monday I was going to school.
At 3.30pm last Sunday I was going to home.
At the 7pm last Monday I was cooking.
At the 10.30pm last Sunday I was watching TV.

SB:U4:-EX18

At 8.30am last Monday I was having breakfast.
At the same time last Sunday I was sleeping.
At 11am last Monday I was going to school.
At 3.30pm last Sunday I was going to home.
At the 7pm last Monday I was cooking.
At the 10.30pm last Sunday I was watching TV.

SB:U4:-EX17

1. d 2. c 3. a 4. b

SB:U4:-EX15

1. amazed
2. sad
3. thrilled
4. anxious
5. nervous
6. puzzled