教你正确用(十一)(英文)

A Through the months that I have been writing the column of "A Cup of English,"I have made friends with some of our young readers and corresponded with them frequently.Some of them are high school students.some are college students.and some are teachers. They all have one thing in common-they want to improve their English.I am sharing a reader letter in today's column.The question raised in the letter.I think,may be relevant to other readers.