他们很快就要到家了。

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.

我们很快就会完成这个项目。

We'll finish the project ___before ___too ___long.