用括号内所给词的适当形式填空。 1. Many books and magazines are _ (aim) specifically at teenagers. 2.You should buy a dictionary. It's very _ (use) for your study. 3. They asked me so many questions that I got _ (confuse). 4.When you buy something, you have to be _ (care). 5. Don't believe him. He didn't tell you the (true).