ne has a responsibility to save _____water, if future generations are to enjoy a similar standard of living to _____we enjoy now.

trees grow tall by pruning. _____, a child needs education to become a personuseful to society.

_________ Tom _________ Mary speaks good Chinese, so they can communicate with the Chinese students very well.

Mr. Johnson was so much afraid of losing his job that he had to _______ his pride when the boss called him names in public.

Johnson would have faced the music but he ______ doingthings like that.