Choose the best option.
I tried and tried but I can't/couldn't open the jar.
How nice of you to write and thank me. You really had to/needn't have.
When we were at school we must/had to wear school uniform. We all hated it.
a
b
C
d
I heard a noise. I think it must have/should have been the cat jumping
through the window.
e You could have/would have laughed if you'd seen his face!
f
I'm afraid I can't have/wasn't able to get in touch with George.
g You might have/can't have seen Tim. He left for the States last week.
h
I think you should have/had to apologized to Samantha.
i
I needn't/didn't have to work last Sunday. I had a day off.
j
That letter must/might have arrived by now. I sent it yesterday.