at the terrible news that I didn’t know what to say.A. So sad Mary lookedBSo sad did M

问题补充：

at the terrible news that I didn’t know what to say.

A. So sad Mary looked

BSo sad did Mary look

C. So sadly Mary looked

DSo sadly did Mary look

答案：

A. So sad Mary looked

(答案→)B. So sad did Mary look

C. So sadly Mary looked

D. So sadly did Mary look

解析：考查倒装句。So/such结构放在句首要使用部分倒装的结构。因为look在这里是系动词，意为：看起来，所以应使用sad 这个形容词，构成系表结构，sad要跟在so 的后面。句意：听到这个消息Mary看起来是如此的难过以至于我都不知道说什么。