Have you finished your homework _________ — Yes, I’ve ________ finished it.

Who’s your science teacher this term?–Mr. Wang. _______ is a good teacher.

Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistakebecomes ______.[ ]

This record can stop ______ , so you needn’t worry about it[ ]

You’d better ______ your flight reservation at thelatest 3 days in advance.