The leaders from some of the countries suggested the nuclear weapon about Iran worth paying attention _______ at the international conference.

—Can I drive on the free way, Mr．Green?—You can when you____________ a bit more skilled．

For some time the expert __________ people of the health risks caused by passive smoking. He     says he won’t stop until all the smokers around him decide to quit smoking. 

Since you weren’t at the meeting, we _____ the decision without you. 

I need to go back home before I _________ money.