[ Grammar ]
I am allergic to cats _____ I have three of them.
A. And
B. For
C. Yet
D. So

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-ed and -ing AdjectivesInfinitive or GerundSentence Types and ConjunctionsTenses and Passive VoicePresent Continuous for FutureSentencesIf Conditional Zero and OneGrammar Present Perfect (ever never)Simple vs Present Continuous TensesPast Tense vs Present Perfect TenseOther quiz:
Vocabulary › ViewWhat is the meaning of concord?
A. Conflict or disagreement.
B. A type of musical composition.
C. A legal term for a contract.
D. Agreement or harmony.
Vocabulary › View
Pollution can have serious effects_________ the balance of ecosystem.
A. in
B. on
C. to
D. for
Tenses › ViewShe ___ to the office when the traffic jam occurred.
A. drove
B. was driving
C. has been driving
D. has driven
Vocabulary › View
Jack’s not well I think we should call an __________ .
A. illness
B. accident
C. ambulance
D. engine
