4. The problem of deciding at what point a baby’s imitations can be considered as speech________.

　　A. is important because words have different meanings for different people

　　B. is not especially important because the changeover takes place gradually

　　C. is one that should be properly understood because the meaning of words changes with age

　　D. is one that should be completely ignored(忽略)because children’s use of words is often meaningless

　　5. The speaker implies________.

　　A. parents can never hope to teach their children new sounds

　　B. children no longer imitate people after they begin to speak

　　C. children who are good at imitating learn new words more quickly

　　D. even after they have learnt to speak， children still enjoy imitating

　　答案解析：BDABD

　　1. 該問題的關鍵在Before start speaking，短文的第一段的第二句話明確給出“Children are greatly different in the amount of listening they do before they start speaking”。根據這句話答案選擇B

　　2. 在這個問題中，需要注意的是“who start speaking late”，也就是第一段第二句話中提到的“later starters”。所以回答這個問題還需要在第二句話中尋找答案“later starters are often long listeners.” long listeners在指的就是often take a long time in learning to listen properly，所以答案選擇D.

　　3.關鍵詞回歸定位，首先要找到“noises”在第二段，所以需要在這段內容中尋找答案。 在第二段第二句話 “during the first few months one or two noises sort themselves as particularly expressive as delight， pain， friendliness， and so on. ” 中 我們不難發現，delight， pain， friendliness這些詞都是表達孩子的情緒和感覺(moods and feelings)，所以答案選擇A.

　　4.在第三段中我們可以找出答案“it is clear that what a child means by a word will change as he gains more experience of the world .”這句話的意思是說“一個孩子通過一個單詞要表達的意思會隨著經驗的增多而有所變化”，所以該題的答案選擇B.

　　5.這道題可以用排除法，首先，通過最后一段的這句話“Playful and meaningless imitation of what other people say continues after the child has begun to speak for himself”，我們可以看出，孩子在長大以后會繼續模仿大人的說話，所以排除B選項；C和D選項的內容在文章中沒有提及。而A選項中提到了“teach their children new sounds”與最后一段中的最后一句話呼應，所以通過排除法選擇A.