It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry. 
| A．when; then | B．not; until | C．not until; that | D．only; when |
.
—Alex has lost his job.
—________? As far as I know, he is devoted to his work.
| A．What for | B．So what | C．How’s that | D．How come |
.
When chatting with a stranger on the Internet, bear in mind______ he could be anybody, for you can’t see him _________.
| A．that; in particular | B．that; in person | C．what; in detail | D．\ ; in public |
.
—You must apologize to Rebecca for being so rude, Sam.
—Why ________ I say sorry? It’s she ________ said insulting words first.
| A．should; who | B．must; whom | C．can; that | D．will; who |
.
31.All parents are willing to risk ________ their lives to save ________ of their children when a disaster is approaching.
| A．losing; that | B．to lose; those | C．losing; those | D．having lost; the ones |
.
________ people are concerned about now is the Shanghai World Expo, which ________ start on May 1st.
| A．What; is due to | B．Which; is going to |
| C．That; is to | D．What; is about to |