my boss' office Keats' poems
His 7's look like 9's.
Make sure that your t's look different from your x's.
The teacher had only four A's in his class.
You have used too many and's in your themes.
The string section consists of four instruments: violin, viola, cello, and bass.
Judges have a double duty: They（或they）must protect the innocent and punish the guilty.
Dear Sir: /Ladies and Gentlemen:
Dear Sir，/Ladies and Gentlemen，
The plane will take off at 16:30.
You will find it in Genesis 2:4-7.
On January 1, 1863, Lincoln declared the slaves “forever free.”
The witness said, “I distinctly heard him say, ‘Don't be late,’ and then heard the door closed.”
（2）英国用法: 先用单引号，再用双引号；所引用的内容，如果是词组，逗号、句号等标点位于引号外，如果是句子，逗号、句号等标点位于引号内。 如：
The word ‘bread’, for example, has both standard and slang meanings.
The witness said, ‘I distinctly heard him say, “Don't be late,” and then heard the door closed.’