[ Grammar ]
Your immune system works more __________ when you get enough rest.
A. calmly
B. effectively
C. calm
D. effective

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Tenses and Word FormationMix-TensesSimple PresentAdverbs and Time ExpressionsFigurative Language VocabularyTenses and Passive VoiceIF CLAUSEGrammar - Future ActionCountable & Noncountable NounsSentence and FragmentOther quiz:
Conjunctions › View______ the secret of how to make silk remained inside Asia, Europeans were forced to pay incredibly high sum of money for this mysterious material to be bought overland to Europe.
A. Although
B. Only if
C. Due to
D. As long as
Can/Could › View
I have to study for a test. I _____ come to your party.
A. can
B. can’t
C. could
D. couldn’t
Phrasal Verbs › ViewA man was knocked ______ by a car and taken to hospital.
A. over
B. out
C. down
Modal Verbs › View
Identify the modal verb in the following sentence: “She could have been more careful with her words.”
A. could
B. have
C. been
D. careful