Every solid object ______ reflect a sound，varying according to the size and nature of the object． 

Don’t play with dog, Jack, for it _____ be dangerous at times.

He desired that he ______ the right to vote.

 Frankly speaking, I'd rather you________anything about it for the time being.

---Will Tony come to the party tonight? ---I’m not sure. He _______stay at home preparing for the coming exam.