He _____ finished earlier.
| A．shallhave | B．oughtto | C．couldhave | D．musthave |
Don’t worry！There are ________that the situation is improving.
| A．signs |
| B．marks |
| C．symbols |
| D．signals |
I hope that full advantage is ________ of our library.
| A．made |
| B．claimed |
| C．taken |
| D．brought |
I’ll need a bit more ________ information before I can help you.
| A．advanced |
| B．underground |
| C．beforehand |
| D．background |
Education should not be restricted to any ________ age group.
| A．particular |
| B．special |
| C．unusual |
| D．specific |
The young surgeon________his first operation successfully.
| A．made |
| B．exercised |
| C．carried |
| D．performed |