[ 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

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Auxiliary WordsComparatives ( adj/ adv)Relative & Interrogative PronounsPresent Perfect SimpleNounsGrammar, Literature, and VocabularyGrammar & VocabAdverbs of Frequency & Simple Present TenseGrammar and PrepositionsSimilesOther quiz:
Subject Verb Agreement › ViewThe teacher, together with her students, __________, busy _____________ the classroom for Parent’ Night.
A. has… decorating
B. are… decorated
C. is… decorated
D. is… decorating
Grammar › View
We meet _____ at the Annual General Meeting.
A. never
B. every day
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Articles › ViewLing is one of the hero that must have … Blue buff to enhance their user’s skill
A. a
B. an
Phrasal Verbs › View
Extension 286? I’ll ______ .
A. put you through
B. get you through
C. come you through
D. break into you
