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IV. Give the correct form or tense of the verbs in brackets.
3. We couldn’t risk (let)___________ him play alone at home.
4. Look at the policeman over there. You (stop) __________ if you try to cross the road now.
5. He was sure that there (be) ___________a serious row when Hugh (hear) _________ of it.
6. He never fails (arrive) _________in time to help me.
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