. A snowstorm , ________is the worst of the past 50 years,________vast areas of southern ,eastern and central China in early 2008. A which ,struck B which ,attacked C that ,beat D that,affected
. ——Chatting online has become_________popular means of communication. ——That’s true.It is especially popular with__________young. A 不填; the B a ; the C不填;不填 D a ;不填