---HasMr.WureturnedfromBeijingyet? ---Yes,buthe

問題詳情：

  ---Has Mr. Wu returned from Beijing yet?

  ---Yes, but he _____ here for only three days before the principal sent him to Shanghai.

A. was                             B. has been              C. will be                D. would be    

【回答】

A

知識點：一般過去時及其被動式

題型：選擇題