—Could you please help me sweep the floor?
—________．
| A．No problem |
| B．That’s all right |
| C．That’s a good idea |
| D．I hope so |
It was getting dark, but the little boy didn’t know______________.
| A．who can he ask for help |
| B．what was wrong with the bike |
| C．where can he go to mend the bike |
| D．if he could arrive home on time or not |
I don’t doubt ____________ she can do it well, but I doubt _________ she is willing to do it.
| A．that; if | B．that; that | C．if; if | D．if; that |
It’s nice ___________ the doctor to devote all the time he has _______ for the patients.
| A．of; to care | B．for; to care | C．for; to caring | D．of; to caring |
--What’s wrong with you , Eric ? You look tired .
--I ______ to prepare for the final exam last night .
| A．picked up | B．woke up | C．stayed up | D．put up |
He realized his mistakes and took action to reduce the loss _________ it was too late.
| A．until | B．when | C．before | D．as |