Mary isn't here at the moment. She _______ later. [ ]

A. comes

B. came

C. has come

D. is coming

大型建筑物、构筑物、重型设备和生产装置等，应布置在（）、地基承载力较大的地段。

A.土质均匀

B.厚度大的新近堆积黄土

C.Ⅳ级自重湿陷性黄土

D.Ⅲ级膨胀土