30. —Why! I get you on the phone.
— We basketball on the playground when you phoned.
A. didn’t; must have been playing
B. didn’t; must be playing
C. couldn’t; must have played
D. couldn’t; must be playing
网友回答
(答案→)A. didn’t; must have been playing
B. didn’t; must be playing
C. couldn’t; must have played
D. couldn’t; must be playing
解析：可联系客服索取此答案。