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he earth for hundreds of millions of years. 科學(xué)家們認(rèn)為數(shù)億年以前地球上已有生命存在了。 8. —How long have you had your bike? 你買自行車有多久了? —I39。 9. I haven39。 10. The doctor asked him to do/take more exercise. 醫(yī)生叫他多進(jìn)行鍛煉。 There are some guests in my home, but I know none of , 但一個(gè)我也不認(rèn)識(shí)。表否定 , 是 all的反義詞 , 指 “ 多者中一個(gè)也不 , 多者中一個(gè)也沒(méi)有 ” , 后面經(jīng)常跟 of短語(yǔ)。常用來(lái)回答 How many/How much提問(wèn)的句子。t like their styles.(2020, 揚(yáng)州 ) A. Either B. Both C. None D. Neither (3)—Wow! You39。 Is your lifestyle healthy?你的生活方式健康嗎? If you don39。 【 拓展精析 】 health“ 健康 ” , 是一個(gè)不可數(shù)名詞 , 其形容詞是healthy, 副詞是 healthily。 “ 保持健康 ” 常表達(dá)為 “ keep healthy/fit”, in good/bad health表示 “ 身體健康 /不健康 ” 。 If you don39。 I have two exercises to do 要做。 【 活學(xué)活用 】 (6)To keep healthy, many people __D__ every day. A. take a shower B. take pride C. take a look D. take exercise (7)He did morning ________ then began to do __D__ in the book. A. exercise; exercise B. exercises; exercise C. exercise; exercises D. exercises; exercises 1. There have/has been...已經(jīng)有 ?? 【 典例在線 】 There has been life on the earth for hundreds of millions of 。 【 拓展精析 】 “there be...”句型表示 “ 某地 /某時(shí)間有 ??” 。如: there is/are...; there was/were...; there have/has been...; there is/are going to be...; there will/must/may be...; there used to be...等。 【 典例在線 】 Since 2020, China has sent six spaceships into 2020年以來(lái) , 中國(guó)已發(fā)送 6艘宇宙飛船進(jìn)入太空。 It39。 【 拓展精析 】 現(xiàn)在完成時(shí): for后接表示一段時(shí)間的詞或短語(yǔ) , 如 for 5 years。即: for+時(shí)間段; since+時(shí)間點(diǎn)。 如: e→ be in; leave→ be away; open→ be open; close→ be closed; begin/start→ be on; borrow→ keep; buy→ have等。 【 活學(xué)活用 】 (4)—I wonder when you __C__ the new watch.(2020, 隨州 ) —Well, I ________ it for two weeks. A. have bought; have had B. bought; have bought C. bought; have had D. have bought; have bought (5)—When will A Bite of China Ⅱ begin tonight? —It __D__ for ten minutes.(2020, 揚(yáng)州 ) A. will begin B. has begun C. will be on D. has been on (6)She __B__