[ Tenses ]
They ____ it yet
A. sent
B. have sent
C. wasn’t sending
D. haven’t sent

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Grammar and Vocabulary › ViewVietnam is ………. multiethnic country with 54 ethnic groups.
A. a
B. an
C. the
Third Conditional › View
Which verb form is used in the ‘if’ clause of the third conditional?
A. Present simple
B. Past simple
C. Past perfect
D. Present perfect