It is partly _____ the summer day is longer that everything has a larger time to warm up.
| A．for | B．that | C．the reason | D．because |
_____ is known to us all is that the 2008 Olympic Games will take place in Beijing.
| A．It | B．What | C．As | D．Which |
Tomorrow is Tom’s birthday. Have you got any idea ___the party is to be held?
| A．what | B．which | C．that | D．where |
___ we are sure about is the need to prevent children from being spoiled.
| A．What | B．Which | C．Whether | D．That |
The news ___ our athletes won another gold medal was reported in yesterday’s newspaper.
| A．which | B．whether | C．what | D．that |
It has been proved ___ eating vegetables in childhood helps to protect you against serious illnesses in later life.
| A．if | B．because | C．when | D．that |