Jenny, you can’t go out to play _____ you finish your homework.

It has been announced recently that all the schools in our country ______ not have students attend school at weekends.[ ]

If I work hard at all my lessons from now on, will I do better in them—Sure, ____________________.

下列各句中，没有语病的一项是

—To tell you the truth, you ______ to win the first prize in the competition.—Sorry for having let you down.[ ]