问题标题:
高一英语填空Willthelecturebeheldat4o'clockthisafternoon?---No,it______________(putoff)tilltomorrowafternoon.Sincethecauseofthisdisease____________(discover),nowweneedtodevelopthemedicinetotreatit.
问题描述:

高一英语填空

Willthelecturebeheldat4o'clockthisafternoon?

---No,it______________(putoff)tilltomorrowafternoon.

Sincethecauseofthisdisease____________(discover),nowweneedtodevelopthemedicinetotreatit.

拱长青回答:
  hasbeenputoff   hasbeendiscovered   原因不太清楚凭语感
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