4th ESO Workbook answers unit 3

 p.24
Unit 3 The energy of tomorrow
Vocabulary  Technology adjectives

1
1 innovative
2 electronic
3 chemical
4 sustainable
5 solar
6 wireless

2
1 mechanical
2 alternative
3 wireless
4 sustainable
5 hydroelectric

3 
1 GREEN
2 S M A R T/SOLAR
3WIND
4 TECH
5 E N E R G Y

4
1 lectronic, Students’ own answers.
2 ireless, Students’ own answers.
3 igh - ech, Students’ own answers.

P.25
Grammar
The passive: past, present and future(will)

1
1 A 2 P 3 A 4 P 5 A

2 *
1 will be shown
2 charged
3 are invited
4 was seen
5 was polluted
6 beat

3
1 was stolen ✗
2 wasn’t written ✓
3 will be built ✗
4 caused ✓
5 is drunk ✗

4
1 will be supplied
2 will be saved
3 is consumed
4 is made
5 was invented
6 were read
7 are given
8 are used

5
Helicopter
1 It was invented in the 20th century.
2 An early version was drawn by
Leonardo da Vinci.
3 Today they are flown by the army.
4 They are also used as air ambulances.
5 Flying drones will be used more and
more
6 They will be transported into space.

P.26
Vocabulary
Function verbs

1
1 transport 2 burn 3 rest 4 boost 5 repair

2
1 absorbed 2 crashed 3 repair
4 rest 5 perform 6 burn

3
1 bsorb 2 oost 3 rocess
4 ransports 5 elease 6 est

4
1 crash 2 boost 3 release 4 burn
5 perform

P.27
Grammar
Reflexive pronouns, each other and one another

1
1 myself 2 yourself 3 herself
4 itself 5 yourselves 6 themselves

2
1 each other
2 themselves
3 each other
4 yourselves
5 one another
6 themselves

3
1 yourselves
2 herself
3 themselves
4 himself
5 myself
6 ourselves

4
1 looked at each other/one another
2 herself at the party
3 closes itself when the software is
installed
4 during the concert itself
5 cooked this paella himself

P.28
Traditions

1
1 B 2 E 3 D 4 C 5 A

2
1 performer 2 dancer 3 training
4 instructor 5 participants

3
1 er, Students’ own answers
2 ance, Students’ own answers
3 ate, Students’ own answers
4 er, Students’ own answers
 
Practical English
Interest, satisfaction and hope
1
1 do 2 in 3 with 4 to 5 with 6 if

2
1 I’m really pleased with second prize.
2 It’d be great if you could tell me about
your invention.
3 I’m a bit disappointed with its
appearance.
4 Having a boss doesn’t appeal to me!