Question 4. Give the correct form of the verbs given in brackets.
1. Nylon _____ (invent) by an American chemist, Julian Hill in the 1930s.
2. What’s the matter? ______ (you/ cut) yourself?
3. An island _____ (cover) by water.
4. This is a great party. I _____(have) a lovely time.
5. When I _____ (got) home, I _____ (receive) a phone call.
6. A burglar _____ (break) into the house while we _____ (watch) television.
7. Teacher’s day _____ (celebrate) largely since 1982.
8. Don’t ask Tim. He _____ (not know) the answer.
9. When the lights _____(go out), I _____ (lie) in bed reading.
10. Have you heard the news? Harry _____(join) the army
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