—Hello, I’d like to see Doctor Smith at 3 o’clock tomorrow afternoon.

—Sorry, but he ________ a patient at that time.

A. will operate on                                            B. will be operating on

C. will have operated on                                   D. will have been operated on

 Just as Alan M． Eddison _______it, “Modern technology _______ ecology an apology． ”

    A． says；owes   B． puts；makes 

    C． said；owed   D．  put； owes

--- What ______ when I phoned you?

--- I ______ my work, and I wanted to go out.

  A. have you done; finished

  B. were you doing; have finished

  C. did you do; had just finished   

  D. were you doing; had just finished

①It's time that we ____ to school.

   ②It is the second time that we _____ to Beijing.

    A.go     B.went      C.have been    D.have gone

 The teacher together with the students         discussing Reading Skills that           newly published in America.

   A. are; were         B.is; were           C.are; was             D. is; was