.
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