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Key to Exercises

UNIT 21 UNIT 22 23.5
3 eaten
21.1 22.1 4 enjoying
3 Glass is made from sand. 2 A bridge is being built. 5 damaged
4 The windows are cleaned 3 The windows are being
6 use
every two weeks. cleaned. 7 gone
5 This room isn't used very 4 The grass is being cut.
8 understand
much. 22.2 9 listening
6 Are we allowed to park here? 3 The window has been broken. 10 pronounced
7 How is this word 4 The roof is being repaired. 11 open
pronounced? 5 The car has been damaged.
9 The house was painted last 6 The houses are being UNIT 24
month. knocked down.
10 My phone was stolen a few 7 The trees have been cut 24.1
days ago. down. 3 got
11 Three people were injured in 8 They have been invited to a 4 brought
the accident. party. 5 paid
12 When was this bridge built? 6 enjoyed
22.3 7 bought
13 I wasn't woken up by the
3 has been repaired 8 sat
noise.
4 was repaired 9 left
14 How were these windows
5 are made 10 happened
broken?
6 were they built 11 heard
15 Were you invited to Jon's
7 Is the photocopier being used 12 put
party last week?
or Is anybody using the 13 caught
21.2 photocopier 14 watched
2 Football is played in m ost... 8 are they called 15 understood
3 Why was the lett er sent 9 were stolen
to ... ? 10 was damaged ... hasn't been 24.2
4 ... where films are made. repaired 2 began begun
5 Where were you born? 3 ate eaten
6 How many languages are UNIT 23 4 drank drunk
5 drove driven
spoken ... ?
23.1 6 spoke spoken
7 ... but nothing was stolen.
3 are 7 do 7 wrote written
8 When was the bicycle
4 Does 8 Is 8 came come
invented?
5 Do 9 does 9 knew known
21.3 6 Is 10 Are 10 took taken
3 is made
23.2 11 went gone
4 were damaged
2 don't 12 gave given
5 was given
3 'm/am not 13 threw thrown
6 are shown
4 isn't 14 forgot forgotten
7 were invited
5 don't 24.3
8 was made
6 doesn't 3 slept
9 was stolen ... was found
7 'm/am not 4 saw
21.4 8 aren't / 're not 5 rained
2 Sarah was born in
23.3 6 lost... seen
Manchester.
2 Did 7 were 7 stolen
3 Her parents were born in
3 were 8 Has 8 went
Ireland.
4 was 9 did 9 finished
4 I was born in ...
5 Has 10 have 10 built
5 My mother was born in ...
6 did 11 learnt/learned
12 ridden
23.4
13 known
2 was 6 've/have
14 fell... hurt
3 Have 7 is
15 ran ... run
4 are 8 was
5 were 9 has
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