I am very grateful for your assistance, and hope that one day 1 may be able to do something for you__________.

There are two main sets of Games — the Winter and the Summer Olympics, and both are held every four years on a _________ basis.­­­­­

The terrible accident is under investigation.—Actually, quicker action _____ those workers trapped in the mine.

We can no longer ____to consider water an almost freeresource that we can use as much as we like

Have you heard about that car accident near theschoolYes，luckily no one________．