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17.【答案】B【解析】根據(jù)上題解釋,in turn應(yīng)為“依次”的意思,引申為“反過來”。while指“在……期間”;since表示“自從”,主句一般用完成時(shí)。suddenly和abruptly都是“突然”的意思,contrarily指“相反地”,but是“但是”的意思,表轉(zhuǎn)折。 答案1.【答案】B【解析】as early as的意思為“同……一樣早”, early是副詞,“早期”的意思,earlier是比較級(jí)“較早”的意思。 of of in the 1950s, a change began to 7 .Too many automobiles had crowded into Main Street 8 too few parking places were 9 shoppers. Because the streets were crowded, merchants began to look with interest at the open spaces 10 the city limits. Open space is what their cardriving customers needed. And open space is what they got 11 the first shopping centre was built. Shopping centres, or rather malls, 12 as a collection of small new stores 13 crowded city c