碱性物的来源有（）。

A.氨基酸脱氨基产生的氨

B.肾小管细胞分泌的氨

C.蔬菜中含有的有机酸盐

D.水果中含有的有机酸盐

E.以上都是

They have ______ most carefully the time and money needed to complete the project.                                                                                                                                     [ ]

A. pick out

B. left out

C. figured out

D. taken out