二十的英文怎么寫的

　　I've been waiting (for) twenty minutes.

　　我等了二十分鐘。

　　We lost twenty minutes changing a tyre.

　　我們換輪胎耽誤了二十分鐘。

　　There were fewer than twenty people there.

　　那里有不到二十個(gè)人。