Is inquiry a necessary step in signing a contract？

The indoor swimming pool seems to be a great deal more luxurious than________.

A．is necessary

B．being necessary

C．to be necessary

D．it is necessary

听力原文：Wasn' t the furniture supposed to be here today？

(A) I don't think that is necessary.

(B) I suppose she will arrive soon.

(C) I thought so.

(36)

A．

B．

C．