[ Grammar ]
Commas NEEDED: My teacher Mr. Thomas knows a lot about history.
A. after teacher
B. after Thomas
C. after teacher and after Thomas

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Adverb of TimeComparatives and SuperlativesTime ExpressionsCompound Nouns and Compound Adjectives QuestionsPrepositions & Prepositional PhrasesVerb Present Simple TenseModals and VocabularySo - Too - Either - NeitherGerunds as Objects of PrepositionsPossessive Adjectives and Possessive PronounsOther quiz:
Vocabulary › ViewWhat does “allow” mean?
A. Very much so
B. Very big
C. To let another do something
D. Going far down
If vs. Unless › View
_ _ _ _ _ _ you don’t save some money, you can’t go on vacation.
A. If
B. Unless