[ Grammar ]
are forms of carbon has been known since the late 18th century.
A. Diamonds
B. Diamonds, which
C. Because diamonds
D. That diamonds

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Modals - Have to or ShouldFuture Perfect TenseAdjectives & QuantifiersPreference & Future TensePronounciation and GrammarModal PossibilitiesConjunctions and Verb TensesGrammar : Must (Necessity)AnalogyComparative & Superlative AdverbsOther quiz:
Grammar › ViewI ___ a coffee first thing every morning.
A. has
B. have
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Every morning, employees ________ (check) their emails first thing.
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Don’t worry. I ____ the dishes.
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