I had no idea of the machine...
I had no idea of the machine...
I had no idea of the machine ____ already.
A.to be tested B.having been tested
C.testing D.tested
This drug,when ____ by mouth,is ineffective.
A.giving B.give
C.gives D.given
这两题,我的答案是B D,B,求大虾指点原因.