––When did they arrive?––They two hours ago .They here for two hours .A. arrived; have ar

问题补充：

––When did they arrive?

––They two hours ago .They here for two hours .

A. arrived; have arrived

B. arrived; have been

C. got; have been

D. reached; have reached

答案：

A. arrived; have arrived

(答案→)B. arrived; have been

C. got; have been

D. reached; have reached

解析：句意：他们什么时候到的？两小时前，他们已经到了两个小时了。two hours ago两小时前，要用过去时，reach是非延续性动词，所以要用表示状态的词be，故选B。