【题目】________ a clear attitude ________ the island argument is probably the most important thing we’ll do.
A. Showing; concerned B. Show; concerning
C. To show; concerned D. Showing; concerning
在线课程【答案】D
【解析】考查动词的-ing形式作主语及介词。句意：关于岛屿争端表现出清晰的态度可能是最重要的事情。用动名词短语showing a clear attitude作主语，concerning在此句中用作介词，意为“关于”。故选D。