Walkingoutofitwitha

問題詳情：

 Walking out of it with a ____ smile on his face, he turned ____ goodbye to his classmates in the classroom.

   A. forcing; to say                     B. forced; to saying         

C. forcing; to saying                   D. forced; to say 

【回答】

D

知識點：非謂語動詞

題型：選擇題