飞机上装备（）个机组氧气瓶

He spoke in a quiet, distinct voice, as though his thought        （）

If it     （）     tomorrow, what would we do?

If it    （）      rain, we （）        get wet.

It is required that you    （）        at six.

If he had not gone out in the storm （）          .

The boy acted     （）       he had never lived in Canada before.

He demanded that the laboratory report （）    immediately after the experiment was done.

He is not （）        a fool   （）     .

A steel plant is a place      （）   I am longing to visit these years.

Do you know who lives in the building   （）       there is a well.