【正文】
。last是持續(xù)動詞,提問持續(xù)動詞所持續(xù)的時間用how long,故排除B和D選項,until表示動作的持續(xù) , 故選C。When。How long。When。How long。 【點評】考查連詞辨析,注意連詞until的用法。……就……;;;。D.C.B.29.The battle continued for several hours ___________ darkness came on. A.A如何,B如果不,C或者,C但是,根據(jù)你會錯過早班車的,可知此處是假設(shè)不及時行動,故是unless , 故選B。D.C.B.d better hurry. A. 【點評】考查連詞辨析,首先識記連詞詞義,然后根據(jù)句意確定。;;;。D.C.B.27.__________he won 500 million pounds prize, he still lived in a small flat. A.his bad leg不是句子,所以用because of。because of【答案】 D 【解析】【分析】句意:那位作家因為腿不好走得慢。assincebecause 【點評】考查連詞辨析,首先識記連詞詞義,然后根據(jù)since引導(dǎo)時間狀語從句,從句用一般過去時,主句用現(xiàn)在完成時確定。......之前;......時候;;......之后。after【答案】 C 【解析】【分析】句意:——自從中國建立三沙市以來,當(dāng)?shù)氐纳顥l件有了很大的改善。C.when25.— The local living conditions(條件) have improved a lot ________________ China set up the city of Sansha. — And more and more people would like to go there for business.A. 【點評】考查連詞辨析。根據(jù)it39。D.soB.or24.— What subject do you prefer? — I prefer science ________________ it39。s much greener,可知上下文之間有遞進(jìn)關(guān)系,故答案為D。此外,它更環(huán)保,因為它使用電力。D.Even thoughWhat39。s much greener because it uses electricity. A.掌握either…or…或者……或者……。故答案選C。 nor既不,也不。 C. either。 ……和……兩者都;B. not only。A. both。neither。 orC.not only。 and22.My parents want me to be _______ an engineer ________ a scientist in the future, but I would like to be a singer. A.not…until,直到……才,故選B。though【答案】 B 【解析】【分析】句意:我的老板正等著匯報,因此我直到完成匯報才能離開這兒。B.since21.My boss is waiting for the report,