[ Perfect Modals ]
They ________ been more careful with their decision.
A. must have
B. could have
C. should have
D. would have

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Conjunctions - Conjunctive AdverbsPast PerfectModal Verb-Ing and Infinitive Verb PatternsCardiology ServicesPassive SentencesSimple Present VS Present ContinuousPresent Continuos TensePassive VoiceTenses and ComparisonsOther quiz:
Tenses › ViewChose the correct option to complete the gap.
She ________ her homework at 4 yesterday.
A. finishes
B. is finishing
C. finished
Past Continuous Tense › View
When it started raining, the boys ___________________ in the pool.
A. were swimming
B. were swam
C. did swimming
D. did swim
Adverb Clauses › ViewWhich subordinating conjunction is used to introduce an adverb clause of contrast?
A. since
B. while
C. because
D. unless
Phrasal Verbs › View
I hope help comes soon, Julie. I don’t think we can ______ much longer.
A. hold back
B. hold over
C. hold in
D. hold out
