题目内容
用括号中动词的适当形式填空
I found John ________(sit) at the desk, ________(do) his homework carefully.
答案：sitting,doing
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同步练习强化拓展系列答案题目内容
用括号中动词的适当形式填空
I found John ________(sit) at the desk, ________(do) his homework carefully.
同步练习强化拓展系列答案