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Articles and DeterminersPast TensesPrepositions of Place & TimeModals for RecommendationsModal Auxiliaries and To Be VerbsGiving and Asking for AbilityComparative and Superlative AdverbsMesopotamia VocabularySimple Present and Past TensesWord FormationOther quiz:
Phrasal Verb › ViewThe United Nations has called ______________ to act swiftly.
A. in
B. in on
C. on
D. off
Grammar › View
They swim every day. Look! They________.
a. swims
b. swam
c. is swimming
d. are swimming