—How do you find your new classmates?

—Most of them are kind, but        is so good to me as Bruce.  [ ]

A. none

B. no one

C. every one

D. some one

下列各组中的两种有机物不属于同分异构体的是

A．葡萄糖与果糖

B．CH₃CH₂COOH和CH₃COOCH₃

C．正丁烷和异丁烷

D．淀粉和纤维素