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Word FormationAdverbs (manners & modifiers)Adverbs of Frequency & Simple Present TenseComparisionNoun QuantifiersAdverb Identification, Function, and FormationConjunctions and PrepositionsIf ConditionalsSimple TensePronouns and Subject Verb AgreementOther quiz:
Modals of Obligation › ViewChoose the correct option to complete the sentences:
Companies ___________ invest in technology to communicate with customers online.
A. have to
B. mustn’t
C. has to
Grammar › View
There are ____ students here today. There aren’t enough chairs for them all.
A. too much
B. too many
C. enough
D. some