题目

下列属于不完全变态和完全变态的昆虫依次是A、蜘蛛和菜粉蝶                                           B、蝗虫和蜈蚣C、家蚕和蟑螂                                    D、蝗虫和蜜蜂 答案：DMost of the students are worried ______ the coming maths exam.A. of B. about C. for D. with