President Hu Jintao demanded every effort ________ to rescue and treat the injured when the earthquake happened in Yushu．
| A．is made | B．must be made |
| C．be made | D．should make |
____ puzzled the mother most was ____the son would never agree with her.
| A．What; why | B．That; how | C．Which; when | D．What; where |
— ____ in this street? — I think Mr. Black is the richest man.
| A．Whom do you think is the richest man |
| B．Who do you think is the richest man |
| C．Do you think who is the richest man |
| D．Do you think whom is the richest man |
I haven’t found my watch yet; in fact, I’m not sure ____ I could have done with it.
| A．where | B．whether | C．what | D．how |
I was advised to arrange for insurance ____ I needed medical treatment.
| A．nevertheless | B．although | C．in case | D．so that |
They were surprised that a four-year-old boy should work out such a difficult problem ____ they themselves couldn’t.
| A．once | B．then | C．while | D．if |