---John,whyareyousoupset? ---I­­­      mycellphoneallm...

問題詳情：

 ---John, why are you so upset?

 ---I­­­       my cell phone all morning but it is nowhere to be found.

   A. am looking for               B. have been looking for    

   C. have looked for              D. had looked for

【回答】

B

知識點：現在完成進行時及其被動式

題型：選擇題