All of us still remember the terrible earthquake that Tangshan twenty years ago.A. attack

问题补充：

All of us still remember the terrible earthquake that Tangshan twenty years ago.

A. attacked

B. struck

C. knocked

D. exploded

答案：

A. attacked

(答案→)B. struck

C. knocked

D. exploded

解析：表示自然灾害“侵害”了某地，我们可以用hit或strike, 但不可以用attack或knock。attack表示“进攻；袭击”，多表示用武力进攻；knock是“敲打”的意思。