John went through the test paper once more carefully for fear that he would         any essential detail.

No conclusion  _______  about the new product until the result of the experiment has been announced.

You have no chance of getting the position. I'm afraid you ________ your time if you apply for it.

(2014·宁波一模) The headmaster has retired but no one knows who will________him in the post.

——Tomorrow ____ my birthday. I’d like you and Jane to come.——I’m not sure if she ____ free.