Swimming alone ____ be ____ dangerous. Do be careful.
| A．need, highly | B．may, high | C．can; highly | D．can; high |
If you really have to leave during the meeting, you’d better leave ____ the back door.
| A．for | B．by | C．across | D．out |
If you really have to leave during the meeting, you’d better leave ____ the back door.
| A．for | B．by | C．across | D．out |
—Did the book give the information you needed?
—Yes. But _____ it, I had to read the entire book.
| A．to find | B．find | C．to finding | D．finding |
The companies are working together to createthey hope will be the best means of transport in the 21st century.
| A．which | B．that | C．what | D．who |
No decisionabout any future appointment until all the candidates have been interviewed.
| A．will be made | B．is made | C．is being made | D．has been made |