(2011·陕西)It is not how much we do but how much love we put into what we do ________ benefits our work most.

It was a matter of ________ would take the position.

—I drove to Zhuhai for the air show last week.
—Is that ________ you had a few days off?

It is generally considered unwise to give a child ________ he or she wants.

—You can't imagine ________ fantastic fun online chatting is.
—Really？But it may cause a lot of trouble sometimes.

It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

Engines are to machines ________ hearts are to animals.

(2013·重庆，25)________ we have enough evidence，we can't win the case.

(2013·四川，7)He is so busy.He cannot afford enough time with his son________he wants to.

(2013·陕西，18)I have heard a lot of good things about you ________ I came back from abroad.