[ Vocabulary ]
The American people must take action right now to deal with the problem of pollution that _______________ so large on our horizon.
A. looms
B. seethes

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Modal Auxiliary VerbsComparatives and ConjunctionsCoordinating ConjunctionsPronoun Antecedent AgreementSo, Such, Many, MuchPresent and Past Simple TensePrepositions of Time and PlaceTransitionsConjunctions and Verb TensesFuture Continuous, Future Perfect and Future Perfect ContinuousOther quiz:
Subject-Verb Agreement › ViewNeither of the twins _____ helpful.
A. Was
B. Were
Modal Verbs › View
You ___ be careful when crossing the street.
A. can
B. must
C. may
D. might