His careless driving _____ him his life.

The stones each ________ as much as two tons.

As soon as the crew(船员) were attacked, the police _________to look into the matter.

It’s quite normal to    ten percent of the cost of a building for a period of six months or so, in case faults are found in it.

For all these years I have been working for others. I’m hoping I’ll _____ my own business someday.