______you may have，you should gather your courage to face the challenge.
| A．However a serious problem |
| B．What a serious problem |
| C．However serious a problem |
| D．What serious a problem |
.—Mary wants to see you tonight.
—I’d rather she_________tomorrow.
| A．comes | B．came |
| C．will come | D．should come |
—What_________him to do such a silly thing?
—I have no idea.
| A．made | B．drove | C．brought | D．let |
The student was just about to_________ the question,when suddenly he found the answer.
| A．arrive at | B．work out |
| C．stick to | D．give up |
.I wish I_________ longer this morning,but I had to get up and come to class.
| A．could have slept | B．slept |
| C．might have slept | D．have slept |
We _________ our breakfast when an old man came to the door.
| A．just have had | B．have just had |
| C．just had | D．had just had |