A friend of mine save a little boy ________ in the river ________ is very deep．

A.drowning; that

B.drown; it

C.drowned; that

D.drowning; it

答案及解析： A

本题要求你要学会区分drowning(落水的)和drowned(溺死的)两个词语后一空是定语从句，关系代词作主语，所以用that。