(     )1. A. The guitar can't be Alice's.
           B. The guitar must be Alice's.
           C. The guitar might be Alice's.
(     )2. A. To be poor is more serious than to be dishonest.
           B. To be dishonest is as serious as to be poor.
           C. It is more of a problem to be dishonest than to be poor.
(     )3. A. I don't eat food that tastes terrible. 
           B. I eat not only good food but also bad food.
           C. I only eat expensive food.
(     )4. A. The survey shows us clearly that teenagers' hopes are similar.
           B. The survey shows us clearly that teenagers' hopes are different.
           C. The survey shows us clearly that teenagers' hopes are the same.
(     )5. A. Each of them spends several hour a week on the volunteer work.
           B. Each of them wastes several hours a week on the volunteer work.
           C. Each of them costs several hours a week to do the volunteer work.