Hurry up, they are gaining on us!

快, 他渐渐赶了!

Hurry up. Tie up your shoelaces; we are late.

快点, 你的, 晚了。

Hurry up, we're wasting time.

快点儿, 别再浪费时间了。

Hurry up! You'll be late.

赶快! 你会迟到的。