Some companies are thinking of ways to save natural _____ by making better use of the water used in the bathroom.
All the essays _____________, the teacher sent the students home.
---I was trying to carry out the plan, but I failed. ---Well, you _________, for we were uncertain it would do ________.
Up till now, full use of this theory has been ________ in building large ocean-going ships.
If I hadn’t stood under the ladder to catch you, you _________ now.
He likes ______ music so much that I think it right to buy him _____ Mp4 as _____ birthday present.