問題詳情
21. Helen: What are you doing?
Kevin: I _______.
(A) dance
(B) is dancing
(C) dancing
(D) am dancing
Kevin: I _______.
(A) dance
(B) is dancing
(C) dancing
(D) am dancing
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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