[ Grammar ]
One combination is not possible: source of
A. people
B. information
C. energy
D. opportunities

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Articles & QuantifiersTenses, Determiners & Subject Verb AgreementPast Perfect and Past Perfect ContinuousInversion + Passive VoicePersuasive TextPassive SentenceSimple Past ContinuosPrepositions and AdverbsConjunctions and PrepositionAuxiliary WordsOther quiz:
Vocabulary and Grammar › View. That’s a great _____ . You’re the scariest vampire I’ve ever seen!
A. uniform
B. bargain
C. costume
D. purchase
Vocabulary › View
impair-
A. to make imperfect, damage, harm
B. not able to be defeated, unbeatable
C. drooping; without energy, sluggish
D. to get stuck; mud; wet, swampy ground; a tough situation
Preference & Future Tense › ViewA: I can’t find my keys!
B:I _______________ (help) you look for them.
A. will help
B. am going to help
Modal Verbs › View
It _________ rain, but the possibilities are low, there are only a few clouds in the sky.
A. has to
B. might
C. could
D. must