题目

—Sorry, sir. But is this umbrella yours? —Oh, sorry. I just took it_______. Mine is under the seat.       A. for yourself  B. by mistake   C. by accident  D. at last 答案：B我们吃的西瓜和甘蔗，分别是植物的（ ）A．果实、茎B．种子、根C．种子、叶D．果实、根