[ 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

Random Topics:
Auxiliary WordsGerunds + To InfinitivePrepositions & Prepositional PhrasesGiving and Asking for AbilityAdjective & AdverbModal VerbPreposition FormSentences vs Run-OnsPossessive Pronouns and Adjective PronounsPreposition and AdjectiveOther quiz:
Proverbs › ViewHonesty is….
A. worth two in the bush.
B. you leap.
C. there is a way.
D. the best policy.
Gerund and Infinitives › View
Her parents would like _________ to her graduation ceremony.
A. being invited
B. to invite
C. to be invited
D. to be invite
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
