下列（）不宜采用立管式孔隙水压力计。（）

A.观测弱透水层的稳定水位

B.观测排水固结处理地基时的孔隙水压力

C.观测强夯法处理地基时的孔隙水压力

D.作为观测孔观测抽水试验的水位下降

Please _____ my homework to Jack, and tell him to _____ to the math teacher.   [ ]

A. hand in; pass it on                              

B. pass on; hand in it  

C. pass on; hand it in                              

D. hand in; pass on it