Once------ in the exam,the students who've done it would be punished.
A:caught cheated. B caught cheating.
suddenly, a tall man driving a golden carriage seized the girl and took her away,----into the woods.
A:disappearing. B:disappeared.
Don't be taken in by products ------ to help you lose weight in a week.
A:claiming , B: claimed.
帮我分析一下,以上我都不懂。顺便指出 是哪块知识,我好补充。