Itisbelievedthatanewkindofdrug 國語站 題庫 2.34W 大中小設定文字大小 問題詳情:It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months. A. has been developed B. is being developedC. is developing D. has developed【回答】B知識點:現在進行時及其被動式題型:選擇題 TAG標籤:#