I like swimming，while what my brother enjoys ______.
| A．cooking | B．to cook | C．is cooking | D．cook |
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 museum will open in the spring with an exhibition and a viewing platform ________ visitors can watch the big glasshouses being built.
| A．what | B．where |
| C．when | D．why |
The children，________ had played the whole day long，were worn out.
| A．all of what | B．all of which |
| C．all of them | D．all of whom |
Finally he reached a lonely island ________ was completely cut off from the outside world.
| A．when | B．where |
| C．which | D．whom |
There is no simple answer，________ is often the case in science.
| A．as | B．that |
| C．when | D．where |