1 . 新旧更替的时代已经到来，在走向未来的过程中，我们不可能将过去的一切都保存下来。
There comes a time when the old must ________ ________ ________ the new, and it is not possible to ________ everything ________ our past as we move towards the future.

3 . _______ is no use crying over the spilt milk. （用适当的词填空）

4 . _____ is known to us that the Amber Room belongs to the Russians.

A．As

B．Which

C．It

D．What

5 . —It’s reported__________the new underground line has been completed.
—Yes, but it hasn’t been made clear ________ it’s to be opened to traffic.

A．when; when

B．that; that

C．when; that

D．that; when

6 . The doctor thought ________ would be good for you to have a holiday.

A．this

B．that

C．one

D．it

7 .        is known to everybody that the moon travels round the earth once every month.

A．It

B．As

C．That

D．Which