1.Do you think it is right?—Yes,( ).
A.I don't think B.I think C.I think so D.I don't think so
2.Wash your hands right now,Jane.Don't ( )your hands dirty.
A.get B.keep C.have D.let
3.Your father works in a factor,(
A.isn't he B.don't she C.doesn't she D.aren't she
4.Must we finish writing these words?No,you( ).
A.mustn't B.can't C.may not D.needn't