单选题 The two newest companies ______ the semiconductor community by surprise when they introduced an advanced technology to the market.
【正确答案】 B
【答案解析】[解析] 语法：时态
1．本题考查动词时态，原句缺少谓语，因此排除不能做谓语动词的C、D选项。
2．主语是复数，A选项takes是单数形式与主语不符，因而排除。过去分词B项为正确选项。