The socks are so ______ that they can't be mended any more.
| A．used up | B．worn out | C．tired out | D．broken out |
At times, worrying is a normal __________ to a difficult event or situation—a loved one being __________ in an accident, for example.
| A．response; injured | B．reaction; wounded |
| C．reply; hurt | D．reflection; died |
We have come to the __________ that it would be unwise to accept his idea.
| A．suggestion | B．conclusion |
| C．plan | D．promise |
Mary is a (n) __________ customer, so the waiter knows her likes and dislikes.
| A．usual | B．ordinary |
| C．common | D．regular |
The number of students applying for this position __________ 320.
| A．added | B．added up |
| C．added to | D．added up to |
We offered these students a summer course, aimed __________ improving their spoken English.
| A．to | B．in |
| C．at | D．for |