Famous physicists from all over the world came to the US to the 100th anniversary of Alber

问题补充：

Famous physicists from all over the world came to the US to the 100th anniversary of Albert Einstein’s birth.

A. congratulate

B. celebrate

C. applaud

D. participate

答案：

A. congratulate

(答案→)B. celebrate

C. applaud

D. participate

解析：选项congratulate祝贺； celebrate 庆祝；applaud 鼓掌；participate 参加。句意：来自著名的物理学家们来到美国庆祝爱因斯坦的100岁生日。根据句意选B。