1. difficulty 用法：have difficulty with; have difficulties with sth. ; have difficulty in doing sth.
Note： 表示一般概念时不可数，表示具体困难时可数。
2. disagree 用法：disagree with sb.
Note： disagree虽然在形式上有否定前缀，但并不是个否定词。注意它的`反义问句形式：He disagreed with you， didnt he?
3. distance 用法：in the distance; at a distance
Note： 可用于引申含义，表示时间上或情感上的距离。
4. divide 用法：divideinto表示把分成几份。强调分成等份。
Note： 可以表示除法，如：Nine divided by three is three.
5. do 用法：do away with， do sb. a favour; do up; do with.， do wonders， do sb. wrong = do wrong to sb.
Note： 主要用作及物动词；不及物时表示行：If you have no pen， pencil will do.
do .助动词（无词意） What do you call this in English?
这个用英语怎么说？
do with 涉及到 What are you going to do with the books?
你打算拿这些书怎么办？
do up ones hair 盘起长发 do up sth 包/捆起来 do out 打扫，收拾
do away with =get rid of 废除，去掉，取消
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