Passage 1

16. What are scientists trying to explain according to the passage?
答案：(A) How being an identical twin influences one’s identify.
【點(diǎn)評(píng)】：細(xì)節(jié)題。本篇文章開(kāi)頭即指出 ‘they(scientists) are trying to explain how being half of the biological pair influences a twin’s identity.’由此可知科學(xué)家一直試圖想要解釋雙胞胎的身份人格是如何受到影響的。

17. What do we learn about the twin Jims?
答案：(B) They grew up in different surroundings.
【點(diǎn)評(píng)】：細(xì)節(jié)題。關(guān)鍵詞即是Jim 這個(gè)名字。關(guān)于兩個(gè)Jim的情況是：他們一直生長(zhǎng)在不同家庭，直到39歲才見(jiàn)面?！?grew up in different families and did not meet for 39 years.’ 他們都結(jié)過(guò)兩次婚，第二次婚姻中，妻子都叫貝蒂?！瓸oth men were married twice… and their second wives were both named Betty.’ 而他們的第一個(gè)孩子都是兒子 ‘Both twins named their first sons James Allen.’

18. Why are scientists interested in studying identical twins raised in different families?
答案：(A) They want to find out the relationship between environment and biology.
【點(diǎn)評(píng)】：細(xì)節(jié)題。通過(guò)對(duì)兩個(gè)Jim的研究， These twins help scientists understand the connection between environment and biology。