21.As luck would have it, he was caught by the teacher again。不幸的是，他又一次被老師逮個正著。

22.She held the little boy by the right hand。她抓著小男孩的右手。(這里"by"與"with"動作主語完全相反)

23.Are you there?等于句型：Do you follow me?

24.If you think he is a good man, think again。如果你認為他是好人，那你就大錯特錯了。

25.She has blue eyes。她長著雙藍眼睛。

26.That took his breath away。他大驚失色。

27.Two is company but three is none。兩人成伴，三人不歡。

28.The elevator girl reads between passengers。開電梯的姑娘在沒有乘客時看書。
　"between"="without":相同用法：She modeled between roles。譯成：她不演戲時去客串下模特。

29.Students are still arriving。學生還沒有到齊。

30.I must not stay here and do nothing。我不能什么都不做待在這兒。