Choose the correct answer to the following questions.
“I bought two bottles of milk.” - “You _____________ have bought milk; we have heaps of it in the house.”
A.couldn’t
B.needn’t
C.mustn’t
D.hadn’t

Choose the correct answer to the following questions.
If you go to a dentist with a private practice, you _____________ pay him quite a lot of money.
A.have to
B.must have
C.ought
D.need

Choose the correct answer to the following questions.
If a letter comes for me, _____________ you please forward it to this address?
A.shall
B.could
C.must
D.should

Choose the correct answer to the following questions.
The swimmer was very tired, but he _____________ the shore before he collapsed.
A.was able to reach
B.can reach
C.could reach
D.has reached

Choose the correct answer to the following questions.
We _____________ reheat the pie. We can eat it cold.
A.needn’t
B.must
C.mustn’t
D.should have

Choose the correct answer to the following questions.
If you had to, _____________ you go without food and drink?
A.can
B.could
C.must
D.will

The discovery was a major ............. for research workers
A.break-in
B.break-out
C.break-through
D.break-down

Choose the correct answer to the following questions.
When I first went to England, I _____________ English, but I _____________ it.
A.can read / can’t speak
B.can read / couldn’t speak
C.could read / couldn’t speak
D.could read / can’t speak

Choose the correct answer to the following questions.
“Did you hear me come in last night?” - “No, I _____________ asleep.”
A.must be
B.must have been
C.should be
D.should have been

Choose the correct answer to the following questions.
When the fog lifts, we _____________ where we are.
A.could see
B.will be able to see
C.must have seen
D.are seeing