— How could you ______ my sister so easily in the crowd?
— Because she stood out in her red dress.
| A．pick up | B．pick out | C．take up | D．take out |
After a knock at the door, the children heard his mother’s voice him．
| A．calling | B．called | C．being called | D．to call |
Not until the train pulled into the next station ______ that his briefcase had gone.
| A．did Tom find | B．Tom did found | C．Tom had found | D．Tom found |
John lost his job last year, but it wasn't long ______ he found a new position in another company.
| A．after | B．while | C．as | D．before |
In most cases, customers can't help ______ to buy things they actually do not need.
| A．to persuade | B．being persuaded | C．persuading | D．to be persuaded |
What do you think of his suggestion ______ we organize a football club?
| A．which | B．whether | C．that | D．what |