Not until he left his home __________ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he has begun |
（届江西省师大附中鹰潭一中宜春中学等重点中学高三联考英语试卷）
When asked to explain ________ made his lessons so exciting, the teacher kept silent.
| A．what it was that | B．that what it was |
| C．what was it that | D．that what was it |
（2014届山东师大附中高三第三次模拟考试英语试卷）
The limits of a person’s intelligence, generally speaking ,are fixed at birth, but he reaches these limits will depend on his environment.
| A．where | B．whether | C．that | D．why |
（2014届福建省五校高中毕业班期末摸底统一考试英语试卷）
It was not just the size of the school but ________ it provides for us students________ made it unique.
| A．that; that | B．what; that | C．what; what | D．that; what |
（2014届江西省赣州市六校高三上学期期末联考英语试卷）
is hard is to do good all one’s life and never do anything bad.
| A．That | B．What | C．All | D．Which |
（届云南省景洪市第一中学高三上学期期末考试英语试卷）
It's said that ________ gains from house sales should pay the individual income tax.
| A．who | B．whose | C．which | D．whoever |