Buses here are always crowded with passengers, so I prefer _____ there rather than take a bus.
.—The earthquake has killed over two thousand people in Yushu.—________.
.—Alex has lost his job.—________? As far as I know, he is devoted to his work.
.When chatting with a stranger on the Internet, bear in mind______ he could be anybody, for you can’t see him _________.
.—You must apologize to Rebecca for being so rude, Sam.—Why ________ I say sorry? It’s she ________ said insulting words first.
.31.All parents are willing to risk ________ their lives to save ________ of their children when a disaster is approaching.