— Do you still remember when we went to Nanjing?
— I can't remember now but ________sometime last summer?
| A．might it be | B．could it be | C．could it have been | D．should it have been |
（2014届浙江省建人高复高三上学期第五次月考英语试卷）
It never occurred to me _____ you could succeed in persuading him to change his mind.
| A．which | B．what | C．that | D．if |
（届湖南省十三校高三3月第一次联考英语试卷）
_____ is well known to the world is that China has very top technology in space industry．
| A．It | B．As | C．What | D．Which |
（届福建省莆田市高三3月质量检测英语试卷）
It is not immediately clear __________ the housing price will go down.
| A．how | B．what | C．that | D．whether |
（届河南省偃师高级中学高三下学期第一次月考英语试卷）
_____________ made Jim most excited was, I think, ____________ he had passed all the exams.
| A．That, what | B．What, which | C．That, which | D．What, that |
（届安徽省安庆市高三第二次模拟考试英语试卷）
As the spokeswoman said, ______ we should take action against them depends on what they will do.
| A．why | B．if | C．whether | D．that |