er后綴的單詞不表示人

　　She of all people should know the answer to that.

　　在所有的人中，唯有她最應知道那個問題的答案。

　　Any high school student could tell you the answer.

　　隨便一個高中生都可以告訴你答案。

　　Put your hand up if you know the answer.

　　知道答案就舉手。

　　Time's up ─ have you worked out the answer yet?

　　時間到了，你得出答案了沒有？

　　I can't easily give an answer to your question.

　　你的問題我難以回答。