[ Present and Past Simple Passive ]
This problem ______by your brother yesterday
A. was solved
B. will be solved
C. is solved
D. solves

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ExclamationPast Perfect Tense and Past TensePast or Present Verb TenseActive and Passive Gerunds and InfinitivesPast Continues TenseAdverbs by TypeSuperlativesPreposition and Word FormAdverb ClauseMixed GrammarOther quiz:
Vocabulary › ViewChoose the word that is most similar in meaning to “vital.”
A. unnecessary
B. essential
C. tranquil
D. ominous
Grammar › View
Grandma _____ well last night, and neither did Grandpa.
A. slept
B. could not sleep
C. was sleeping
D. did not sleep