[ Grammar ]
Oil shale is a soft, fine-grained sedimentary rock _____ oil and natural gas are obtained.
A. from
B. is from
C. is which
D. from which
Select your answer:
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Grammar › ViewA: What ________ the teacher ________ on the board?
B: The word “newspaper”.
A. are – writing
B. does – write
C. is – writing
D. are – writing
Grammar › View
My best friends ______ late to school.
A. is often
B. often are
C. are often
D. often does