[ Grammar ]
He has a good __________ of complex mathematical concepts.
A. grasp
B. knowledge
C. comprehension

Random Topics:
Present Tense vs Past TenseClausesIndefinite ArticleVerbs: Will & Going toPossessive AdjectivesPrepositions after Verbs and AdjectiveAspect or tenses of VerbsPresent ContinousModal Verbs - ObligationPast Simple & Past ContinuousOther quiz:
Grammar › ViewUse your _____ and try try to think what it would be like to live 200 years ago.
A. imagine
B. imagining
C. imagination
Parts of Speech › View
She suddenly changed her mind about selling her house.
- adverb
- conjunction
- adjective
- interjection
Grammar and Vocabulary › View
Those are ________.
A. cars fast
B. fast cars
C. fasts cars
Present Tense › View
Jo ________ eats meat. She is a vegetarian.
A. always
B. usually
C. often
D. never
