13.Who ( ) gave you those flowers?

42.I had to admit that I know little about economics.

41.What can you see if you shut your eyes?

40.I suddenly saw a spider on the ceiling.

39.The old lady was looking at him from head to foot.

38.He didn’t go to bed until he had finished his work.

37.I learnt yesterday that his mother had gone abroad.

36.We hadn’t even arrived at the airport when the plane took off.

35.Please remember to close the windows before you leave.

34.Our school was founded in 1957.

33.I suppose he will lend you some money.