Can you tell me over there ?Awhat are you doing ?Bwhat to do itCwhat they are do

问题补充：

,Can you tell me over there ?

Awhat are you doing ?

Bwhat to do it

Cwhat they are doing

Dwhat they doing

答案：

A. what are you doing ?

B. what to do it

(答案→)C. what they are doing

D. what they doing

解析：此题考查宾语从句的语序，无论何种句式充当宾语从句都要用陈述句语序从句要用陈述句语序，根据A，B，C和D四个选项来看只有C和D是陈述句语序，而D的结构不完整，用进行时态却少了系动词be，故选C。