If times______（变了)，have our ways of thinking changed too？ （change)

If these new methods don’t work，we’11 have to__________our old system．A.fall through###SXB

If we had enough time to prepare, the result______ much better.A．would beB．would have been

Its time that we ______ firm measures to protect our environment.A．have takenB．tookC．are t

If John_____to the university, he would have to work hard.A．had goneB．were to goC．wentD．wa

If you have really been living in France for so many years, its about time you ______ able

If we_____all night we_____in time; but we have no intention of working all nightA．work, w