• 2021-04-14
    —Has Sam finished his homework today?

    —I have no idea. He ________ it this morning.
  • was doing

    内容

    • 0

      ---Has he finished his paper? ---I don't know. He ____ it this morning. A: has written B: wrote C: had written D: was writing

    • 1

      I will have finished my homework by the time he ______(arrive) tomorrow.

    • 2

      He must have finished his homework, ____? A: didn't she B: did she C: hasn't she D: has she

    • 3

      Three-fourths of the homework _____today. A: has finished B: has been finished C: have finished D: have been finished

    • 4

      He has difficulty _________ his homework alone. A: finish B: to finish C: finishing D: finished