Look at the pairs of sentences below. Both of them are grammatically correct. Choose one sentences in each pair, a or b, that is more logical.
6.a)My friend didn't wait for me when I arrived late.
b) My friend wasn't waiting for me when I arrived late.
7.a)When did he have the accident? - As he was climbing up the ladder.
b) When was he having the accident? - As he was climbing up the ladder.
8.a)I read a book when she sent me an SMS.
b) I was reading a book when she sent me an SMS.
9.a)Did you eat lunch when the fire alarm rang?
b) Were you eating lunch when the fire alarm rang?
10.a)It was a beautiful day. The sun shone and there wasn't a could in the sky.
b) It was a beautiful day. The sun was shining and there wasn't a could in the sky. ​