1 . It hasn’t been decided yet__________ the new restaurant will open.

A．whose

B．that

C．when

D．which

3 . ________ the two trains crashed into each other still remains unknown, but the police say that it could be due to the heavy snow. （用适当的词填空）

4 . It is often the case ________ anything is possible for those who hang onto hopes. （用适当的词填空）

5 . As a matter of fact, ________ the sun rises in the morning varies from place to place. (用适当的词填空)

6 . ______ he is focusing on is the ancient Chinese literature and he is fascinated by Tang poetry. (用适当的词填空)

7 . ________John was late for the class has been unexplained. （用适当的词填空）

8 . It is not immediately clear _______the financial crisis will soon be over. (用适当的词填空)

9 . It is likely________ the donation in the form of funds will come in one week. （用适当的词填空）

10 . It is generally admitted ________ the moon is a world of silence. （用适当的词填空）