AIDS is said ______the biggest health challenge to both men and women in that area over the past few years.
| A．that it is | B．to be | C．that it has been | D．to have been |
The president of the World Bank says he has a passion for China，__________ he remembers starting as early as his childhood.
| A．where | B．which |
| C．what | D．when |
The famous scientist said it was his primary school teachers and their lessons __________ he was fond of __________ influenced his whole life.
| A．that; that | B．that; which |
| C．which; which | D．what; that |
That evening，__________ I will tell you more about later, I ended up working very late.
| A．that | B．which |
| C．what | D．when |
After the flooding, people were suffering in that area，__________ urgently needed clean water, medicine and shelter to survive.
| A．which | B．who |
| C．where | D．what |
Mo Yan was awarded the Nobel Prize for Literature in 2012，__________ made one of the Chinese people's long-held dreams come true.
| A．it | B．that |
| C．what | D．which |