4.The traffic jams during morning and afternoon rush hours are a headache in big cities now.

56.This kind of plant ______ a lot of water at all times.

55.- How are you, Bob?
- ________

54.- Thank you for calling.
-

53.- How much is this necklace?
-

52.- Congratulations! You won the first prize in today's speech contest.
-

51.- Shall we sit up here on the grass or down there near the water?
- _____

50.His salary as a driver is much higher than ________.

49.When Lily came home at 5 p.m. yesterday, her mother _____dinner in the kitchen.

48.Eggs, though rich in nourishments, have ______ of fat.

47.You______to the meeting this afternoon if you have something important to do.