1.Itwasessentialthattheapplicationforms____________backbeforethedeadline.
A.mustbesentB.wouldcome
C.besentD.weresent
选B,但为什么不选C?
2.Ifyou_____thatnight,youmighthavebeentoolatetogetyourticket.
A.didn’thurryB.hadn’thurried
C.wouldn’thurryD.had’ttohurry
选B,为什么不选择了D?
3.It’sdecidedthatthepresentrateofdeforestation_________tocontinue.
A.willnotbeallowedB.isnotallowed
B.wouldnotbeallowedD.shouldnotbeallowed
选D,为什么不选择了A?
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