Some Chinese students have ____ English well.
| A．difficulty in learning | B．difficulty to learn |
| C．difficulties learned | D．difficulties to learn |
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 |
--- I’ve read another book this week
--- Well, maybe is not how much you read but what you read that counts. (2009 .浙江)
| A．this |
| B．that |
| C．there |
| D．it |
It was 80 years before Christopher Columbus crossed the Atlantic _Zheng He had sailed to East Africa．（2012．重庆）
| A．when |
| B．that |
| C．after |
| D．since |