----- Why did you eat your words, Billy?

----- Sorry, dear．But I really forgot where I was _____ to meet you．

A．demanded

B．imagined

C．supposed

D．guessed

骨组织的组成不包括（）

A.骨细胞

B.无机纤维

C.黏蛋白

D.无机结晶体

E.水