deduction exercises

1. Deduction exercise
1) Choose the correct answer:
1- She (must be – can’t be – must have been- can’t have been) out when I phoned as
no one answered.
2- She (must – can – can’t – might) have telephoned because I was in ally day.
3- Last week, I saw a doctor going to my neighbour’s house. Someone there (may be –
must be – must have been – can’t be) ill.
4- It has got wings; so it (can’t – will – mustn’t – must) be a bird.
5- It (must be – can’t be – can be – must have been) my homework, it isn’t my
handwriting.
6- I’m not sure; he (might be – might have been – must be – must have been) tired
when he stopped working.
7- He is absent, he (must – must be – must have been – cannot be) ill.
8- He has just been told of his success; he (must be – may be – might be – can’t be)
angry.
9- He didn’t come to school last week. He (must be – can be – can’t have been – must
have been) ill.
10- He (must drink – won’t drink – can’t have drunk – must have drunk) the tea,
there isn’t any in the cup.
2) Rewrite the following sentences using the word (s) in brackets to give the same
meaning:
1- This school was certainly built before 1980. (must)
2- His plane arrived at the airport at five o’clock; I think he is on his way home
(must)
3- He was late; I suppose he probably missed the eight o’clock train.
(have)
4- This is most unlikely to be my pen as my pen fell in the river.
(can’t)
5- I am very uncertain he received my letter. (have receive)
6- I am not sure he was injured in the accident. (might)
7- I am nearly certain he played football yesterday. (must)
8- I am very uncertain he got the prize. (have)
9- I am uncertain he travelled to the country. (have)
10- Perhaps my uncle went shopping. (have)