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②The key question is ________ focus; why not reach a decision? 主要问题已经非常清晰，为何不得出结论呢？ ③You cannot depend on your eyes when your imagination is ________ focus. 想象一旦变得模糊，那么你的眼睛也就靠不住了。 答案 ①focus on ②in ③out of 【巧学助记】 【联想归纳】请想一想我们学过的表示“集中于；专心于”的短语还有哪些？请补全。 ④________ on ⑤be ________ in ⑥be ________ to ⑦be ________ in ⑧be ________ in ⑨be ________ to 答案 ④concentrate ⑤absorbed ⑥addicted ⑦lost ⑧buried ⑨devoted 3.harm vt.& n.伤害，损害 [高考例句] (2017·湖南，书面表达) For another，drinking too cold or too hot water does nothing but harm to our health. 其次，饮用太冷或太热的水只会对健康造成伤害。 (1)do/cause harm to 对……造成伤害 do sb harm＝do harm to sb 伤害某人；对某人有害 There is no harm in doing sth ＝It does no harm to do sth 做某事无害处 (2) be harmful to...对……有害 ①He may not be able to help but there's no harm ________ asking him. 他可能帮不了忙，但是求他一下也无妨。 ②(2017·重庆，写作)Indeed，the phone can bring great convenience to our life.However，it can be ________(harm) to our friendship. 手机的确能给我们的生活带来很大的方便。然而，它对我们的友谊是有害的。 答案 ①in ②harmful 4.suggest vt.建议，提议；推荐；表明，暗示 | 
