Upon reading the notice all the staff of the company stood there , looking at ea

Upon reading the notice all the staff of the company stood there        ,  looking at each other.

A.no speaking

B.speechlessly

C.speechless;

D.did not speaking

试题答案

C

speechlessly（adv）不是修饰动词stood 的，而是 speechless（adj）用来修饰主语all the staff of the company，即形容词做主补,所以选 C。