[ Grammar ]
The new app _______ (start) yesterday, and lots of people are using it.
A. starts
B. starting
C. started
D. start

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Verb TenseActive and Passive Gerunds and InfinitivesPast and Present Continuous tenseAction VerbPresent Perfect or Past SimpleTenses and ConclusionsDemonstrative SpeechGrammar (Adjectives)Present Perfect - Just, Already, YetGrammar-Verbs & Nouns Singular, Plural, GenderOther quiz:
Perfect Modals › ViewYou _______ studied harder for the test.
A. Might have
B. Should have
C. Could have
D. Must have
Grammar › View
Stella and Artyom are studying together. They help ____ prepare for the test.
A. themselves
B. himself
C. her
D. each other
