There be句型中,连接并列主语的and在改为一般疑问句的时候,到底要不要变成or?There are 2 pens and a book in the bag.Are there 2 pens and a book in the bag?不用,如果变成or,就变成选择疑问句,这样疑问句的意思就变成“包里有2支笔还是橡皮?”而不是“包里有2支笔和橡皮吗?”这样意思就改变了。所以There is a book and 2 pens in the bag.的一般疑问句是“Is there a book and 2 pens in the bag?”