There is no doubt that the Diaoyu Islands arepart of China and what some Japanese have don

问题补充：

There is no doubt that the Diaoyu Islands arepart of China and what some Japanese have done recently is actuallyinsult against China’s territorial sovereignty.

A. a;/

B. a; the

C. the;/

D. /; an

答案：

A. a;/

B. a; the

C. the;/

(答案→)D. /; an

解析：句意：不容怀疑钓鱼岛是中国的一个组成部分，日本人所做的一切实际上都侵犯了中国的领土主权。这里part of是……的组成部分；第二空insult是“冒犯”在这里指一种冒犯，所以前面用不定冠词来修饰，故选D。