题目

把下列动物和对它们的描述用线连起来。大象 世界上最大的鸟长颈鹿 世界上最小的鸟蜂鸟 陆地上最大的动物鸵鸟 世界上最高的动物 答案： This is the first time that I ________ to give a lecture to so large a audience till now． [　　] A． am invited B． have invited C． have been invited D． will be invited