— Has Jack finished his homework yet?
— I have no idea；he ＿＿it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
I have an appointment ________ Professor Li, but I need to change it.
| A．from | B．in | C．with | D．to |
Had you taken it more seriously, you ________ such a silly mistake.
| A．may not make | B．couldn’t make |
| C．mustn’t have made | D．wouldn’t have made |
The car is quite small, ________ when you have children, so change it for a larger one if possible.
| A．occasionally | B．especially |
| C．frequently | D．conveniently |
The internet was flooded with a game called the Ice Bucket Challenge（冰桶挑战）, ________ raise awareness for a disease called ALS.
| A．aims to | B．aim to |
| C．aiming to | D．was aimed to |
The school makes every effort to treat students as individuals and to help each one to achieve their full ________.
| A．profit | B．anniversary |
| C．sympathy | D．potential |