There _________ be any difficulty about winning the speech contest now that you’re well prepared for it.

His desk-mate refused to help him cheat in the examination, which made him _____. [ ]

The look on his face suggested that he just happened _______ the secret and _______ he himself was very shocked, too.

Would you mind if I sit here— . It’s for the old woman there.

_______the police thought he was the most likely one,since they had no exact proof about it,theycould not arrest him.[ ]