请选择ABCD*J4V4~2[.F --What are you doing ________?3b9v6r4v*U6N'[9l*D:t9c)[4m
--I’m busy ________ my lessons.3b9v6r4v*U6N'[9l*D:t9c)[4m
A. lonely; review3b9v6r4v*U6N'[9l*D:t9c)[4m
B. alone; having3b9v6r4v*U6N'[9l*D:t9c)[4m
C. lonely; do3b9v6r4v*U6N'[9l*D:t9c)[4m
D. alone; reviewing3b9v6r4v*U6N'[9l*D:t9c)[4m