Some people argue that using _____ nature to meet our own needs may spell disaster, unless we start to look around and understand how ______ clean environment benefits us all.

If you need some help, please call_____ _____ 887-7880.

Li Hua’s parents hold different opinions on whether they should have ________ child.

The man,suspected________having stolen the jewels of the shop,was missing last night,although he was watched over by the police.[ ]

You were brave enough to raise objections at the meeting.—Well, now I regret that.