【正文】 原因；B. or連詞，或者、否則，通常表示選擇，有時(shí)也表示轉(zhuǎn)擇；C. as連詞，引導(dǎo)原因狀語(yǔ)從句或時(shí)間主語(yǔ)從句；D. so連詞，所以，表示結(jié)果?？疾檫B詞辨析。根據(jù)句意可知前后句是轉(zhuǎn)折，故選A。But：但是，表示轉(zhuǎn)折關(guān)系；and：和，表示順承和遞進(jìn)；or：或者，表示選擇關(guān)系；so：因此，表示因果關(guān)系?？键c(diǎn)：考查連詞的用法解析：D【解析】試題分析：句意：快點(diǎn)，否則你就不能按時(shí)完成工作。故選C。though雖然，盡管，可以引導(dǎo)讓步狀語(yǔ)從句；but 但是，表示轉(zhuǎn)折；so 因此，所以，表示因果關(guān)系；or 或者，否則。 or B．a(chǎn)nd 。t be afraid to make mistakes， _________ you39。t eat up all the food he ordered,________he took the rest away.A．for B．or C．a(chǎn)s D．so6．The music was too loud, I turned it down.A．so B．because C．but D．or7．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．because8．Put your books in the drawer, _____ they won’t get lost.A．or B．a(chǎn)nd C．but D．so9．— 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．but10．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．so11．I like taking photos, _____my cousin doesn’t like it.A．a(chǎn)nd B．but C．or D．so12．People cut down too many trees, _____ the greenhouse effect bees more and more serious.A．so B．because C．a(chǎn)lthough D．if13．—The brown jacket is nice, ________ it doesn’t look good on me.—Why not try on the blue one? I think blue suits you fine.A．a(chǎn)nd B．so C．but D．or14．Lucy, don’t turn off the puter before closing all programs, ________you could have problems.A．or B．a(chǎn)nd C．but D．so15．Mr. Pitt had to cheer up soon, ______ he would lose the game pletely.A．a(chǎn)nd B．so C．but D．or16．Just leave the key to the exercises behind, you will be dependent on it.A．or B．a(chǎn)nd C．so D．but17．Mike， don39。s the secret of success, Dr. Know? 一 More time and effort, _________ you’ll make it some day.A．yet B．or C．a(chǎn)nd D．but32．The F1 driver is hugely talented, ________ he still works hard to achieve his goals.A．so B．but C．if D．though33．The team met a lot of difficulties, ______ they never gave up and won the game at last.A．or: B．a(chǎn)nd C．but D．so34．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．so35．Stephen Hawking had a serious illness, _______ he kept studying physics.A．a(chǎn)nd B．but C．so D．or36．—My uncle is in Beijing now. He lives in the countryside _______ works in the cityduring the week.Oh, he must be tired.A．or B．a(chǎn)nd C．but D．so37．I’d love to go to the theatre tonight, _________ I am too busy.A．so B．or C．but D．a(chǎn)nd38．一Will you go shopping with me_______go to the cinema with Kitty? 一 I’m sorry，_______I’m afraid I can’t．I have so much homework to do now．A．or；but B．or；and C．a(chǎn)nd；but D．a(chǎn)nd；or39．—I don’t like reading ______ watching TV. What about you?—I don’t like reading all day , ______ I like watching TV news.A．a(chǎn)nd 。 but40．I like your story, _______ I’m confused by the e