________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
A、NosoonerHethoroughlyunderstoodthesociety__________.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
WeweretoldthatSuewouldbeidealforthejob,butshe________badlywhenwetalkedtoher.
Whenworkersareorganizedintradeunions,employersfindithardtolaythem________.
Theproblem________whenthestudentsrefusedtodotheirhomework.
