D-1:dead beat 筋疲力尽

A:Where is Tom?

A:汤姆哪去了?

B:He is in the bedroom and fallen asleep.

B:他在卧室睡着了。

A:What? It's only 9:00 p.m. now. Why today he went to bed so early?

A:什么?现在才晚上9点钟。怎么今天他睡得这么早?

B:He ran four miles and came back dead beat.

B：他跑了四英里路，回来时筋疲力尽了。

A:Oh, I see.

A：噢，知道了。