Unit 4 Astronomy: the science of the stars &Unit 5 Canada －“ The True North”Ⅰ. 词汇短语过关1 ． harmful adj. 有害的；伤害的harm n ． &vt. 损伤；伤害harmless adj. 无害的harmlessness n. 无害be harmful to 对……有害do sb. harm/do harm to sb. 对某人有害do more harm than good 弊大于利There is (no) harm in (sb.‘s) doing sth.( 某人 ) 做某事有 ( 无 ) 害处。It does (no) harm (for sb.) to do sth. ( 对于某人来说 )做某事有 ( 无 ) 害处。mean no harm 没有恶意[ 即学即练 1](1)Fruit juice can ______ __________ ______ children‘s teeth. 果汁可能损坏儿童的牙齿。(2)What he did _________ his reputation.他所做的损害了他的名声。beharmfultoharmed(3)He may look fierce, but he _________ ______ ______.他可能看上去很凶，但并无恶意。(4)The court case will ______ ______ ______ ______ my business. 这起诉讼案件将严重损害我的生意。meansnoharmdo serious harmto2 ． exist vi. 存在；生存；维持生活existent adj. 存在的，现存的 existence n. 存在，生存There exists/existed.... 某地有……，存在……exist in 存在于……之中exist on 靠……为生exist by 靠……生存come into existence 开始存在；成立bring ... into existence 使发生，产生[ 即学即练 2](1)________ always ________ a force of attraction between two bodies. 两物体间总是存在着吸引力。(2)They ______ ______ very little food.他们靠极少的食物来生存。(3)That word doesn‘t ______ in English. 英语中没有这个词。Thereexistsexistonexist(4)Fish can't ______ ______ ______ ______. 鱼离开水就不能生存。(5)When did the world ______ ______ ______________ ？世界是什么时候开始产生的？exist outofwatercomeintoexistence3 ． puzzle vt. 使困惑；使糊涂 n. 难题；谜puzzling adj. 令人困惑的puzzled adj. 感到困惑的puzzle about/over sth. 苦苦思索；仔细琢磨puzzle sth. out 琢磨出……的答案；开动脑筋be puzzled by 被……迷惑be in a puzzle about sth. 对某事迷惑不解set a puzzle for sb.( ＝ ...
