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13. I can’t understand _______ Apple's iPad 2.
A. why are they so mad about. B. why they are so mad about
C. how are they so mad about D, how they are so mad about
14. —Can you guess ______ the new schoolbag yesterday?
—Sorry, I’ve no idea.
A. how much did he pay for
B. how much he spent
C. how much he paid for
D. how much did he spend
15. —Mary, could you tell me if your mother ________ our school sports meeting tomorrow?
—I think she will come to school if she _________ free.
A. will take part in; will be
B. takes part in; is
C. will take part in; is
D. takes part in; will be
16.Please tell me________. I have some gifts for him.
A. how has Robert come
B. where Robert is
C. when will Robert leave
D. what does Robert like
17. The policeman asked the small girl __________
A. why she was crying
B. why was she crying
C. why she is crying
D. why is she crying
18. Can you tell me __