题目内容

---________ they ________ trees now?

---No, they ________ next week.


  1. A.
    Do; plant; are planting
  2. B.
    Are; planting; plant
  3. C.
    Are; planting; will plant
  4. D.
    Will; plant; are planting
C
now用于现在进行时,next week用于将来时.
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