Mr. Smith didn’t understand _____ made his son so upset that evening.
| A．what was it | B．why it was this | C．how that was | D．what it was that |
By using your eyes you can tell the direction _____ light comes.
| A．in which | B．from which | C．with which | D．on which |
— Can I have some more chicken?
— ________ you finished your grrens first?
| A．What about | B．How come | C．If only | D．Suppose |
The employers often give the job to _______ they believe have work experience with a strong sense of duty.
| A．whoever | B．whomever | C．who | D．those who |
— Oh, life is so boring!
—Please don’t think so . I suppose you’ve come to the point _______ a change is needed.
| A．where | B．when | C．which | D．as |
Asia has achieved more in controlling the bird flu than Europe in the past few years, _______ the number of people infected with the virus is going up sharply.
| A．when | B．that | C．so that | D．where |