句型What are you doing?及回答 — 英语词汇题
题目
根据情境，用所给动词的适当形式补全对话（每空一词）。放学后的操场上，Jack找不到他的朋友们，打电话问Tony。Jack: Hello, Tony! What ___ you doing? Tony: I ___ playing football with Sam. Jack: What about Kate and Lisa? What ___ they doing? Tony: They ___ running on the playground (操场).