_______he was laid off last year ______ how serious the economic crisis was.
| A．Not until…he realized | B． It was not until… when he realized |
| C．It is not until …that did he realize | D．It was not until …that he realized |
This dictionary, which I bought yesterday, has been highly _______ by my professor.
| A．acknowledged | B．appealed | C．recommended | D．commanded |
It is thought that Henan Shuanghui Industry Group Co., Ltd. ____take responsibility for its consumers.
| A．can | B．may | C．must | D．need |
As a student of Senior Three, he has very little free time __ he can spend developing his own interest.
| A．when | B．in which | C．at which | D．that |
Mary is always ready to do some __ work at the local geracomium（敬老院）in her spare time.
| A．responsible | B． exhausting | C．voluntary | D．professional |
Many experts stick to the view _____ teacher development is the key to the education quality.
| A．which | B．what | C．that | D．where |