John promised his doctor he________not smoke, and he has never smoked ever since. [ ]

Mr. Wang’s never been to Canada, has he—. He went there on businesslast week.

Mary wrote an article on ______ the team had failed to win the game.

Who to come with me–David .

I_______ to the see the film Alice in Wonderland last night but for the fact that I was busy preparing for the English exam.