一、单项选择:从各小题所给的A、B、C、D四个选项中,选出一个最佳答案
(共20小题;每小题1分,满分20分
)1.Youcan’tpasstheexam_________youstudyhard
A.ifB.becauseC.unlessD.so2.Lookout
Don’tgettooclosetothehouseroofisunderrepair
A.whoseB.whichC.ofwhichD.that3.Ifitwerenotforthefactthatshe_________sing,lwouldinvitehertotheparty
A.couldn’tB.shouldn’tC.can’tD.mightnot4.Alwaysreadthe_________onthebottlecarefullyandtaketherightamountofmedicine
A.explanationsB.instructionsC.descriptionsD.introductions5.Greenproductsarebecomingmoreandmorepopularbecausetheyareenvironmentally
A.commonB.variousC.friendlyD.changeable6.—Whathappenedtoyouthismorning
—Theteacheraskedmeformy_____whenIwaslateagain
A.meaningB.ideaC.excuseD.answer7.—Wouldyouhelpmeputawaythesethings
—_________
A.Yes,quiterightB.NevermindC.You’rewelcomeD.Withpleasure8.—Here’scoffeeandtea