【正文】
try while America is a developed country. 16).threeeights 八分之三(分?jǐn)?shù)表達(dá)法:分子用基數(shù)詞,分母用序數(shù)詞,分子大于 1,分母加 s eg. onefifth , twosevenths Twofifths of the work is hard to finish. Threesevenths of teachers in our school are women teachers. 17).prevent ,防止,阻礙 prevention n. prevent sb. from doing sth.=stop sb. from doing sth.=keep sb. from doing sth. 18).make +賓語 +賓補( adj./n,/v./.) eg. We made him our monitor. Raining days make him sad. He often makes us laugh. Speak louder to make yourself heard. (課堂訓(xùn)練題) Listen and answer some questions. 1. How long does it take to fly to Mars at present? is the gravity on Mars? will we live on Mars? will we study ,do homework and take exams? 5 What will food be like on Mars?