DMC的基本作用是什么？

the old man＇s sons wanted to know was   （）     the gold had been hidden.

Ms Nancy didn＇t mind at all     （）   to the ceremony.

Father made a promise（）       I passed the examination he would buy me a bicycle.

The reason   （）     he was late for school was  （）       he had to send his mother to a hospital.

    （）    leaves the room last ought to turn off the lights.

You can have the magazine  （）       I finish reading it.

The teacher spoke loudly    （）    the students could hear him clearly.

We won＇t give up  （）      we should fail ten times.

It worried her a bit      （）           her hair was turning gray.

   （）    we can’t get seems better than         （）        we have.