题目

下列哪项表示的是基因型为YyRr的个体产生的配子？         A．Yy  B．YyRr C．Yr     D．Rr 答案：C31、Dear Sonia, I am having a party for my 13th birthday．Can you come to my birthday party? It will be a wonderful party．You can listen to some pop music and you can see a big birthday cake．I think it’s much bigger than your backpack．It is as big as a desk．Did you see such a cake? It will be a special party, too．It’s also a ball．You can dance to the nice music．But you have to take a partner （伙伴；搭档）．The party begins at 7:00 pm on Friday．Welcome to my house．You will enjoy yourself! Don’t forget to take a boy!                                                                        Yours,                                                                          Lily 1．This is an invitation _____．     A．to a boy           B．From Sonia             C．to Sonia           D．to Lily 2．There is a very _____At the party．     A．big backpack    B．small desk             C．big cake       D．big desk 3．The underlined （划线的） word “ball” means _____．     A．basketball    B．soccer ball              C．dancing party  D．match 4．The party will be held （举行） ______．     A．in the evening                             B．next Friday  C．on the weekends                          D．in the morning 5．If Bob goes to the party, he may need to take a _____ with him．     A．boy           B．girl          C．ball          D．dog