ton

就在这时，我看到一辆二十吨的卡车朝他们疾驰而去。

It was at this point I saw a twenty ___ton lorry speeding towards them.

他今天收到了大量的电子邮件。

He got a ___ton of emails today.

这台二手车他卖了一大笔钱。

He sold this used car for a ___ton.