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Lớp 12
 
ALEX IS BUSY _____ FOR HIS EXAMS. A. STUDYING B. S...
ALEX IS BUSY _____ FOR HIS EXAMS. A. STUDYING B. STUDIES C. ST...
Lớp 12
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Câu 22. Alex is busy _____ for his exams.
A. studying
B. studies
C. studied
D. to study
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câu 22.
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