－What’s wrong with Tom? He didn’t talk to         all the afternoon.－Oh, he failed in his exam.

Mother came into my study with a cup of milk in one of her hands, and an apple in ______.

—The secretary wrote __________ note to the manager.—I guess she forgot writing one.

What seems to be a simple idea always turns out _____ that is hard to put into practice．

Even if they are on sale, these refrigerators are equal in price to, if not more expensive than, _____ at the other store.