A：Keep watch on him so that he won’t be able to escape.

B：We’ve already bound him hand and foot.

A：Just in case he escapes?

B：That’s impossible.

A：看好他，别让他跑了。

B：我们把他手脚绑上了，让他动弹不了。

A：万一他已经跑了呢？

B：不可能的。