座舱高度压力电门在（）情况下被激活

Supposing I    （）  this gift, what would he say?

It is important that I （）    with Mr. Willians immediately.

He insisted that John （）     it.

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.