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.
It‘s_____mypowertomakefinaldecisiononthematter.
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
Copernicusmaintainedthattheearth_____roundthesun.
Itwasnotuntilshehadfinishedallherwork_____.
Thosepeople_____ageneralunderstandingofthepresentsituation.
