他们很快就会到家。

They'll be home ___before ___very ___long.

不久之后，他们意识到生活在那里的大多数动物在欧洲可能是一笔大生意。

___Before ___long they realized that most of the animals which lived there could be big business in Europe.

会议很快就要开始了。

The meeting will start ___before ___too ___long.