There have been several new events ________ to the program for the 2008 Beijing Olympic Games [ ]

Our school library is very big and there are ________ books and magazines in it.

He forgot to lock the door, _______of course, made things even worse.

Everyone can play an important part in society. As members, we should try our best to do __ .

days later, word came ________ourcountry had sent up another man-made satellite