第二讲的第11题：
EL Niflo, the periodic abnormal waming of the sea surface of Peru a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated in the wastern Pacific to flow back to the east.
B) a phenomenon where changes in the ocean and atmosphere are combining to allow the warm water that is accumulating
D) is a phenomenon in which changes in the ocean and atmosphere combine to allow the warm water that has accumulated
想问问， B,除了少了is，还有phenonmenon不能跟where之外，还有别的语法错误么？ 为什么我读 changes in ocean and atmosphere combine to allow, 这个combine是个动词， 怎么觉得放在这里有点怪呢！ 能举几个和这种用法相近的例子么？ 希望能熟悉这种类似的句子。
正确答案是D | 
