I felt surprised that anyone of his intelligence such an easy test.
| A．might have failed | B．could have failed |
| C．should have failed | D．must have failed |
_____ hard she tries, she can hardly avoid making mistakes in her homework.
| A．Much | B．However | C．As | D．Although |
When you read the book, you' d better make a mark _____ you have any questions.
| A．at which | B．at where |
| C．the place | D．where |
Helen listened carefully _____ she might discover exactly what she needed.
| A．in that | B．in order that |
| C．in case | D．even though |
You may arrive in Beijing early _____ you mind taking the night train.
| A．that | B．though | C．unless | D．if |
Bring it nearer _____ I may see it better.
| A．although | B．even though |
| C．so that | D．since |