You had better ______some time every day for sports so that you can keep yourself energetic.

It was obvious that the Climate Change Conference in Copenhagen______the global environmental problems.

One of our rules is that every student ________ wear the school uniform while at school.

 - Why do you choose to work in a kindergarten? - Well, you know, dancing is my _____. So it is my best choice.

---Why are you still here? Everybody has gone to attend the lecture by the president.--Oh, I ___________ about it!