E. Complete the sentences using an appropriate word or phrase.
41. Don't forget the cooker when you leave the house. You may start a fire.
42. I the grass for a long time. I'd better do it now.
43. I must my keys at my mum's. I can't find them anywhere.
44. The man denied the old lady's necklace.
45. The children's clothes are dirty. They garden all morning.

41. Don't forget to turn off the cooker when you leave the house. You may start a fire. 42. I've been cutting the grass for a long time. I'd better do it now. 43. I must look for my keys at my mum's. I can't find them anywhere. 44. The man denied stealing the old lady's necklace. 45. The children's clothes are dirty. They've been playing in the garden all morning.