【题目】How happy we are! The holiday we have been looking forward at last.
A．to having come B．to coming
C．has come D．to has come
在线课程【答案】D
【解析】
试题分析：本题中有一个固定搭配look forward to...期盼，盼望..。但是we have been looking forward to是修饰holiday的定语从句，所以主句缺少谓语动词，且时态是一般时态，所以选择D项。