他们很快就会回家。

They'll be home ___before ___very ___long.

不久之后，他们意识到生活在那里的动物大多数可能成为欧洲的大生意。

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

她很快就会到达。

She will arrive ___before ___too ___long.