[ Vocabulary & Grammar ]
My mother ________ in the supermarket all afternoon.
A. has been working
B. has worked
C. is working
D. works

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TOEFL Adjective and AdverbComparative and Superlative AdjectiveTransitional Phrases and ConjunctionsTransition WordsContinuous TensesAdjectives with PrepositionPresent Simple & ContinuesPresent Simple VS ContinuousConditionals 1,2,3Noun QuantifiersOther quiz:
Adverbs › ViewIdentify the adverb that modifies the other adverb in the following sentence: He runs extremely fast.
A. slowly
B. quickly
C. carefully
D. extremely
Transitive or Intransitive Verbs › View
The bus drivers took a wrong turn at the last stop light.
A. transitive
B. intransitive