We came home and found her ________ on the sofa.
| A．sleep | B．sleeping |
| C．to sleep | D．slept |
We shall not start the project until it ____ by the committee.
| A．will be approved | B．approves |
| C．has been approved | D．is to approve |
What a great weight she felt _____ off her mind the moment she heard she had been admitted to a key university.
| A．take | B．to take |
| C．taking | D．taken |
—Do you know ____ made him successful in his career?
—Yes. His hard work and determination, of course.
| A．what it was that |
| B．what was it that |
| C．it was what that |
| D．was it what that |
With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.
| A．what | B．which |
| C．where | D．when |
—It is a mystery and a shock to all who knew him that he____ have taken his own life in this way.
—What a pity, indeed.
| A．must | B．may |
| C．can | D．should |