Sandy, _______ apple on the table is for you. Remember to eat it.—–Thanks, I will._______ apple a day keeps the doctor away.

The police chief advised his men to keep________ and not lose their tempers.

The old rules have to be ______ because they only applied to the circumstances that existed when they were made a hundred years ago.

下列各句中，没有语病、句意明确的一句是

.— Excuse me. Is this the right way tothe Summer Palace— Sorry, I am not sure, but it _____ be .