— The window must have taken you quite a lot of time that day.
— Right. They____ for weeks.
| A．haven’t been cleaned | B．hadn’t been cleaned |
| C．didn’t clean | D．haven’t cleaned |
In the library new books have to be ___ before they are put on shelves for reader’s use.
| A．listed | B．combined | C．classified | D．made |
Your suggestion sounds very good, but there are many ___ difficulties we have to face.
| A．patient | B．popular | C．productive | D．practical |
Having been ___ volunteer in a day-care centre for weeks, Susan feels much sympathy for ___ disabled.
| A．a; / | B．/; a | C．the; the | D．a; the |
You have made outstanding contributions to the company---I am sure you ___ get promoted this year.
| A．are likely to | B．are bound to |
| C．must | D．have to |
My brother suggested he and I be taken to an amusement park this weekend, and we were glad to know that our busy parents did not ___ to the plan.
| A．object | B．refer | C．listen | D．agree |