Most environmental problems exist because adequate measures for preventing them______taken in the past.

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问题 Most environmental problems exist because adequate measures for preventing them______taken in the past.

选项 A、was not
B、were not
C、were not being
D、had not been

答案B

解析

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专业英语四级

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Most environmental problems exist because adequate measures for preventing them______taken in the past.

专业英语四级

WhichofthefollowingsentencesDOESN’Tincludepassivevoice?

youfurtherproblemswithyourprinter,contactyourdealerforadvice.[2005]

Thecommitteehasanticipatedtheproblemsthat______intheroadconstructionproject.[2007]

Almost60%offive-year-oldsinsomeofBritain’spoorestareasdonotreacha"goodlevel"ofbehaviourandunderstanding—doubl

Nowthatit’ssummer,thegenerationgapintheofficeisasobviousasthealmost-barefeetflip-floppingdownthehallway.Bab

Somescientistsarethinkingtwiceaboutdoingorreportingcertainresearch,reactingtopoliticalandsocialcontroversyinad

Itisreportedthat______adoptedchildrenwanttoknowwhotheirnaturalparentsare.

WhichofthefollowingsentencesisaCOMMAND?

Manydogownersregardtheirfurryfriendsastheirchildren,andtalktothem【C1】______Now,anewstudyreportsthatdogs,

Whatistheauthor’sopinionaboutwork?Whatdoyouthinkisthestyleorgenreofthetext?

Thesefarmersgotagoodharvestlastyear,sothey______abigsumofmoneyfornewfarmmachines.

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