[ Grammar ]
The students ________been taking a break outside. They were taking a state test.
A. couldn’t have
B. could have
C. shouldn’t have
D. should have
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Auxiliary WordsGerunds + To InfinitivePrepositions & Prepositional PhrasesGiving and Asking for AbilityAdjective & AdverbModal VerbPreposition FormSentences vs Run-OnsPossessive Pronouns and Adjective PronounsPreposition and AdjectiveOther quiz:
Grammar › ViewMy mother uses ____ knife to chop some garlic.
A. a
B. an
C. the
1st and 2nd Conditionals › View
If we didn’t _____ about other cultures, we wouldn’t ______ people from other countries.
A. know, understand
B. knew, understand
C. know, understood
D. knew, understood