课时作业(二十一) 必修5 unit 1 great scientists ⅰ.单词拼写 1．the writer was so________(专心于) in her work that she didn’t notice jim enter the room. 2．after eight years of fighting，the chinese people finally________(打败) the japanese enemies. 3．mr green________(宣布) to his friends his engagement to miss white. 4．finding a cure for aids is one of the greatest________(挑战) facing doctors today. 5．it is none of your business whether i accept them or________(拒绝) them. 6．though society is developing fast，there is still no________(治疗) for such a disease.
