WRITING

Complete the following sentence with ‘who’ or ‘which’.
1 Peter Parker is a photographer … changes into Spider-Man to fight criminals.

2 Batman has a special car … can travel very fast.

3 Superman is the best-known hero of American comic books … fights for truth and justice.

4 The only thing that can harm Superman is a green rock … comes from the planet Krypton.

Complete the following sentences with the past simple passive of the verbs in brackets.
1 The first TV remote controls … (use) in the 1950s in the USA.

2 In 1996 a sheep called ‘Dolly’ … (clone) by British scientists from

a single cell that … (take) from a six-year-old female sheep.

3. The first affordable cars … (produce) by Henry Ford.

Fill in the gaps with the right tenses of the verbs in brackets.
1 If we ... (to have) enough water, we ... (to be) thirsty.

2 More species ... (to survive) if we ... (to protect) nature.

3 We ... (to reduce) the use of natural resources if we ... (to recycle) old and used things.

4 Clean water... (not; to be) a problem if people ... (to stop) throwing rubbish into the seas and rivers.

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