You’d better look up the new word in a dictionary _____ you don’t know it ?

You’d better look up the new word in a dictionary _____ you don’t know it ?

A．if                B．that              C．though           D．whether

You’d better look up the new word in a dictionary _____ you don’t know it ?

1. A.
   if
2. B.
   that
3. C.
   though
4. D.
   whether

You’d better look up the new word in a dictionary _____ you don’t know it.

A. if          B. that            C. though           D. whether

 If you don’t know the new word, you’d better ＿＿.

A. look up a dictionary    B. look up an dictionary

C. look it up in a dictionary   D. look up it dictionary

If you don’t know the new word, you’d better ＿＿.