That is a beautiful kingdom _________ three mountains join together and steep mountains reached to the sky.
| A．which | B．whose | C．that | D．where |
The traditional view is ______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
______ he referred to in his article was unknown to the general reader.
| A．That | B．What | C．Whether | D．Where |
____ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
Some children want to challenge themselves by learning a language different from ______ their parents speak at home.
| A．what | B．that | C．which | D．One |
______ was most important to her, she told me, was her family.
| A．It | B．This | C．What | D．As |