Faced with this ________, schools will have to adapt to survive.

[　　]

His first ________ for a vacation would be Disney world.

[　　]

The inventor ________ his belief upon his experiments done in the previous years.

[　　]

________ we achieve gigantic successes in our work, we should not be conceited.

[　　]

Follow the directions carefully, or this medicine may be ________ to you.

[　　]

The people who speak English today ________ the largest speech community in the world with the exception of speakers of Chinese.

[　　]

He married _________ he loved her but because he was indebted to her．

[　　]

You should respect the opinions of others，and at the same time you should insist upon ________ right．

[　　]

A．that you believe is

B．which you believe to be

C．what you believe is

D．what you believe

Is this the reason _________ at the meeting for his carelessness in his work?

[　　]

A．he explained

B．what he explained

C．how he explained

D．why he explained

Recently I bought an ancient Chinese vase, __________ was very reasonable．

[　　]

A．which price

B．the price of which

C．its price

D．the price of whose