Why do we plan?
举一反三
- According to the author, （） A: it is rather complicated to answer the question "Why do we laugh" B: it is really simple to answer the question "Why do we laugh" C: it is not necessary to answer the question "Why do we laugh" D: scientists have already answered the question "Why do we laugh"
- Why do we need these nutrients ?( )
- Why do we take notes?
- I don’t know _________. A: why do this B: why having done this C: why doing this D: why we ought to do this
- Why do we write an invitation letter?