题目

-Jane won the first prize in the English speech contest． 一    big progress she has made!She used to be weak in English． A．How   B．How a C．What  D．What a 答案：C瑞星2008版杀毒软件打七五折销售后，便宜了28元，原价是（　　）元．A．90B．100C．112D．128