________hehasbeenlivingonadifferentplanet,heprobablykno...
来源:语文精选馆 2.1W
问题详情:
________ he has been living on a different planet, he probably knows that there's a new version of Windows—it's called Vista.
A. Once B. Unless C. Though D. If
【回答】
B
知识点:连词
题型:选择题