Oil shale is a soft, fine-grained sedimentary rock _______ oil and natural gas are obtained.

Câu hỏi :

Oil shale is a soft, fine-grained sedimentary rock _______ oil and natural gas are obtained.

A is from 

B  from which

C from           

D is which

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

Copyright © 2021 HOCTAP247