【正文】 安全的，因此你應(yīng)該小心。結(jié)合語境可知前后是轉(zhuǎn)折關(guān)系，故選D。A. or連詞，或者；B. so連詞，所以、那么； C. but連詞，但是；D. because連詞，因?yàn)??？疾檫B詞。A. Because因?yàn)?；B. so因此；C. but但是；D. then然后。句意：人們砍伐了太多的樹木，因此溫室效應(yīng)變得越來越嚴(yán)重。19．B【詳解】句意：這次小心點(diǎn)，否則你會(huì)再犯同樣的錯(cuò)誤。A. or否則，表選擇關(guān)系；B. And和，表并列；C. but但是，表轉(zhuǎn)折；D. so所以，表因果。A. and和，表并列；B. or否則/不然，表相反的結(jié)果；C. so所以，表因果；D. but但是，表轉(zhuǎn)折。A. and 和， B. but 但是； C. so 所以； D. or否則；根據(jù)The traffic rule解析：D【解析】句意：交通法規(guī)規(guī)定司機(jī)喝酒必須不能開車，否則她們會(huì)被處罰。13．D【詳解】句意：Jimmy很早就動(dòng)身去機(jī)場(chǎng)了，否則他將趕不上飛機(jī)。12．A【詳解】句意：露西，在關(guān)閉所有程序之前不要關(guān)掉電腦，否則你會(huì)有問題的。故選B。10．B【詳解】句意：——快點(diǎn)，湯姆，否則我們看電影要遲到了。考查連詞辨析。前后句表示因果關(guān)系，故答案為A。因此我們必須找到一個(gè)旅館呆一晚上。本題考查連詞。A. so所以，表因果（前因后果）；B. because因?yàn)?，表原因（前果后因）；C. but但是，表轉(zhuǎn)折；D. or或者，表選擇。結(jié)合句意，如果不快點(diǎn)，我們就會(huì)晚點(diǎn)，趕不上第一班公交解析：D【解析】句意：快點(diǎn)，否則我們第一班公交車要晚點(diǎn)了。根據(jù)句意可知前后兩句有選擇關(guān)系，要么遵照指示，要么受傷。m too busy.A．a(chǎn)nd B．but C．or D．until34．I phoned Sarah last night, ______ there was no answer.A．a(chǎn)nd B．but C．or D．so35．Liza speaks English very well，_______she doesn’t know Chinese.A．a(chǎn)nd B．so C．but D．Because36．— Would you like to e to my house for dinner?— I’d love to. ____ I have lots of work to do.A．so B．or C．a(chǎn)nd D．but37．I was feeling hungry, ______ I bought myself a sandwich.A．but B．so C．or D．because38．Would you like to lend me some money?I’d love to, _______ I left my purse at home.A．so B．a(chǎn)nd C．or D．but39．I’d like to go swimming with you, ______ I am too busy today.A．but B．a(chǎn)nd C．so D．or40．Would you like to go to the museum with me?I’d love to, ______ I’m afraid I have no time.A．but B．a(chǎn)nd C．or D．so【參考答案】一、選擇題1．B【詳解】句意：遵照老師的指示做，否則你在運(yùn)動(dòng)的時(shí)候會(huì)受傷。 instructions, __________ you may get hurt when exercising.A．so B．or C．but D．a(chǎn)nd2．Hurry up, you can’t finish the work on time.A．a(chǎn)nd B．so C．but D．or3．Hurry up, _______ we’ll be late for the first bus.A．a(chǎn)nd B．but C．so D．or4．The music was too loud, I turned it down.A．so B．because C．but D．or5．I had a fever, _ I went to see a doctor.A．for B．or C．but D．so6．The last bus had left when we arrived，_____ we had to find a hotel to stay for the night．A．so B．but C．or D．because7．It was very dark outside， ___________ we had to feel our way slowly.A．so B．but C．for D．or8．I got up late yesterday, ____ I had to take my breakfast with me on the bus.A．a(chǎn)nd B．but C．or D．so9．Tony had a high fever and coughed a lot, ________ his parents took him to hospital at once.A．for B．but C．or D．so10．—Hurry up, Tom, we’ll be late for the movie.—Ok, I will.A．but B．or C．a(chǎn)nd D．So11．He ran quickly all the way to school, ______ he was still late.A．but B．a(chǎn)nd C．or D．so12．Lucy, don’t turn off the puter before closing all programs, ________you could have problems.A．or B．a(chǎn)nd C．but D．so13．Jimmy set out early for the airport，______ he wou