If he_____the storekeeper ‘s scissors ，he would have forgotten to buy a pair.
B
本题测试的是虚拟语气的用法，其中的条件从句用过去完成时haddone，主句谓语用would/couldmighthave+done.
_____all the representatives still not there ，the meeting was postponed for several hours.
I ‘ve been telling you_____not to do that ，but you neve listened to me.That ’s why you gotinto trouble.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.