57．I fully _________（赞同）with you that it is not too late to act now．

56．We can _________（容易地）forgive a child who is afraid of the dark，but we can’t forgive an adult who is afraid of the light．

55．Of the two coats，I'll choose the _________（便宜）one to save some money for a book．

54．There are several ways to solve this problem．Let's have a _________（讨论）now．

53．_________（幸好），I caught the early bus and got to the railway station Just in time．

52．--Who are you _________（等待）for?

--Andy．He is expected to come here at 3 o'clock．But he hasn't come yet．

51．What a sunny day! There isn't a cloud in the _________（天空）．