The university estimates that living expenses for international students________around $8,450 a year，which________a burden for some of them. (2013·湖南，33)
| A．are；is | B．are；are |
| C．is；are | D．is；is |
It is by no means clear ______ the president can do to end the strike．（2012．全国新课标Ⅱ）
| A．how |
| B．which |
| C．that |
| D．what |
It remains to be seen ______ the newly formed committee’s policy can be put into practice. (2013 .陕西)
| A．that |
| B．which |
| C．what |
| D．whether |
It was only after he had read the papers ______ Mr. Gross realized the task before him was extremely difficult to complete. (2013 .全国新课标Ⅱ)
| A．when |
| B．that |
| C．which |
| D．what |
John’s success has nothing to do with good luck. It is years of hard work______ has made him what he is today. (2011 .湖南)
| A．why |
| B．when |
| C．which |
| D．that |
It was from only a few supplies that she had bought in the
village ______ the hostess cooked such a nice dinner. (2012 .安徽)
| A．where |
| B．that |
| C．when |
| D．which |