unit 4 astronomy:the science of the stars section ⅰ—warming up,pre-reading, reading & comprehending 一、单词拼写 1do you think our education (制度)needs improving? 答案:system 2the discussion has become more and more (激烈的). 答案:violent 3she is (不像)her mother. 答案:unlike 4darwin spent more than 20 years working on his (理论)of evolution. 答案:theory 5these are the (有害的)effects of smoking. 答案:harmful 6the hen was old and it stopped (下蛋)eggs.
