39.IfI_________whenthemilkmancomes,tellhimtoputthebottlesonthatshelf.A.amshoppingB.willbeshoppingC.havebeenshoppingD.amgoingshopping50.Ifyou__________atthecornerwhenIpass,I’llgiveyoualiftintotown.A.arestandin
39.IfI_________whenthemilkmancomes,tellhimtoputthebottlesonthatshelf.
A.amshoppingB.willbeshoppingC.havebeenshoppingD.amgoingshopping
50.Ifyou__________atthecornerwhenIpass,I’llgiveyoualiftintotown.
A.arestandingB.standC.aregoingtostandD.havebeenstanding
这两题有什么不同?为什么第一个要用进行时,而后面那题却不用?
都有when啊……