6. Fill the spaces in the following sentences by using one of these forms + the perfect infinitive of the verbs in brackets.
must + perfect infinitive is used for affirmative deductions can’t/couldn’t + infinitive is used for negative deductions. needn’t + perfect infinitive is used for a past action which Was unnecessary but was performed.

31. I had to get down the mountain in a thick fog. ~ That … (be) very difficult.
32. I saw Ann in the library yesterday. ~ You … (see) her; she is still abroad.
33. How did he get out of the house? He … (come) down the stairs for they were blazing.
34. You … (lend) him your map. He has one of his own.
35. I spoke in English, very slowly. ~ You … (speak) slowly. He speaks English very fluently.
36. He was found unconscious at the foot of the cliff. He … (fall) 200 metres. — Правильный ответ на вопрос найдете ниже