题目

_____ crazy people were when they did online shopping on Black Friday!A.How B.What a C.What an D.What 答案：【答案】A【解析】句意：当人们在黑色星期五网上购物时，他们是多么疯狂！根据crazy people were when they did online shopping on Black Friday!可知这里考查了感叹句，主语是people，谓语是were，本句crazy 它是一个形容词，根据How+形容词/副词+主语+谓语！可知，应该用How，故答案选A。如图为心脏结构图，据图回答：?（1）心脏主要由______组织构成．（2）心脏分为四个腔，分别是A______ B______C______ D______（3）f是位于C和D之间的瓣膜，它的作用是______．