• 2022-06-07
    You can't use the machine because it ___ yet.
    A: has not tested
    B: has not been test
    C: has not been tested
  • C

    内容

    • 0

      I had no idea of the machine _______ already. A: to test B: having been tested C: testing D: having tested

    • 1

      Which of the following statements is FALSE according to the passage A: The machine has not been put into use yet. B: With the machine, you could go to many countries in the world. C: The machine can store up to 240 words. D: With the machine, you will be able to talk with foreigners.

    • 2

      This book is a collection of practical transistor circuits, ____ has been tested by the author in his own laboratory.

    • 3

      __________ this material can be used in our factory has not been studied yet.

    • 4

      Mr Li isn't here, because he ______ Shanghai for something important. A: has been to B: has been in C: has gone to D: went