It is an interesting story and one can’t put it down _____ one has finished reading it.[ ]

If you meet with a problem, _____ the guide here and you’ll settle it in time.[ ]

Where did you find the professor who made the speechyesterday— It was in the hall_______ the students often have ameeting.

’t help __ housework, for he is busy__ for the examination

The man received a ticket for speeding. He ____have driven so fast. [ ]