__________ sleep every night is important for teenagers. _________, loss of sleep can make you feel tired, and even cause you to put on weight.
| A．A good amount of; As a matter of fact | B．A good number of; In truth |
| C．A large amount of; As matter of fact | D．Plenty of; In a fact |
_______he couldn't understand was_________more and more students showed interest in the computer games.
| A．What； because | B．That, what | C．What； why | D．Why； that |
In some countries, ______ is called “equality” does not really mean equal rights for all people.
| A．that | B．what | C．which | D．how |
The news came, as expected, __________ my cousin was chosen to be a foreign aid doctor to go to Africa where people are suffering a lot from aids.
| A．it | B．that | C．what | D．Which |
I try to understand __________ that prevents so many Chinese from being as happy as one might expect.
| A．why is it | B．what is it | C．why it is | D． what it is |
Desertification，the name for ______ happens when farmable land is turned into desert，is a growing world problem.
| A．which | B．where | C．what | D．How |