To return to the problem of water pollution,I'd like you to look at a study _______ in Australia in 2012.( )
A. |
having conducted |
B. |
to be conducted |
C. |
conducting |
D. |
conducted |
推荐套卷
To return to the problem of water pollution,I'd like you to look at a study _______ in Australia in 2012.( )
A. |
having conducted |
B. |
to be conducted |
C. |
conducting |
D. |
conducted |