．China is playing an important role in the world. That’sLaura has come to study Chinese.A.

问题补充：

．China is playing an important role in the world. That’sLaura has come to study Chinese.

A. because

B. why

C. how

D. that

答案：

A. because

(答案→)B. why

C. how

D. that

解析：考查表语从句的连词。句型That’s why 那就是什么的原因，句意：中国在世界上起着非常重要的作用，那就是劳瑞开始学汉语的原因。所以选A。