【Jessiender】評論
A: Who___(C) is clapping ___ in the classroom? B: I have no idea. Maybe Ted and Tony are. 誰在教室拍手?我不知道。也許是Ted和Tony。用Who來問 後面接的動詞要用單數動詞。因為回答用be V回答可知問句是用現在進行式詢問(be V+Ving(A) are clapping (B) clap (C) is clapping (D) claps