Tom’s mother always makes him____ his homework first.

China has recently ______ its waters controls near the Diaoyu Islands to prevent Chinese fishing boats from ______ in the East China Sea．

Some of the rubbish, such as wood, paper and iron,_____ away over a long period of time.

____is known to us all is that the 2008 Olympic Games will take place in Beijing.

’t think he is fit for the job, ______——Why do you think so