[ Grammar ]
Alber knew a lot ….. computers, ….. he studied the subject ….. his exams.
A. About/before/for
B. About/after/for
Select your answer:

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Modal Verbs › ViewWhich modal verb is used to express possibility in the sentence:
“They ________ have already left for the airport.”
A. must
B. can’t
C. may
D. should
Grammar › View
Choose the correct form of its—with or without an apostrophe—for this sentence.
Even my favorite song can lose _____ appeal after I listen to it too many times.
A. its
B. it’s
