[ Vocabulary and Grammar ]
When did you arrive ___ London?
A. in
B. at
Select your answer:
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Interjection & Prepositional PhrasesSimple Past Tense and Past Perfect TenseGerunds and InfitinitivesCountable & Uncountable NounsModals of DeductionPast Simple vs Past ContinuousPast Simple and ContinuousPronouns, Sentence Structure, and ApostrophesComparative and Superlative AdjectivePrepositions and ArticlesOther quiz:
Relative Clause › ViewKim, ______ mother is a physician, is very good at biology.
A. who
B. whose
C. whom
D. which
Vocabulary › View
A gas that is expelled from the body by the respiratory system.
A. nitrogen
B. mercury
C. carbon dioxide
D. oxygen