[ Past Tense ]
Mark ________ lots of books at home.
A. has
B. had

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Grammar › ViewWhen Lady Gaga performed “Just Dance,” she sang beautifully.
What is the antecedent for she in this sentence?
_____
A. performed
B. beautifully
C. Sang
D. Lady Gaga
Grammar › View
. What does English grammar primarily focus on?
A. Vocabulary expansion
B. Word pronunciation
C. Structure of words, phrases, clauses, and sentences
D. Learning new words
VOCAB & GRAMMAR › ViewYou don’t need a new mobile; you ___ a new one last year!
A. bought
B. have bought
C. have been buying
D. had bought
Articles › View
He plays ___ piano every day.
A. a
B. an
C. the
D. X