1. a I was very tired. I tired to keep (keep) my eyes open, but I couldn’t. b I rang the doorbell. but there was no answer. T

1. a I was very tired. I tired to keep (keep) my eyes open, but I couldn’t.
b I rang the doorbell. but there was no answer. Then I tried…….(knock) on the door, but there was still no answer.
c We tried ……(put) the fire out but without success. We had to call the fire brigade.
d Sue needed to borrow some money. She tried……..(ask) Gerry, but he was short of money too.
e I tried …….(reach) the shelf, but I wasn’t tall enough.
f Please leave me alone. I’m trying ………….(concentrate)



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