我们最好走快点——要是走得这么慢，得花上老半天了。

We'd better walk a bit quicker - it's going to take ___forever if we go this slowly.

那会耗费极其漫长的时间。

It would take ___forever.

想从那家公司拿到退款简直遥遥无期。

Trying to get a refund from that company takes ___forever.