[ Grammar ]
Listen! Someone _______ at the door.
A. knock
B. knocking
C. is knocking
D. knocks
Select your answer:
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Conjunctions and Connectives › ViewHe speaks Spanish fluently, _____ he has lived in Mexico for many years.
A. so
B. for
C. and
D. unless
Definite Articles › View
…. Nile is the longest river in Africa.
A. some
B. a
C. the
D. –