根据所给要求，完成下列句子
1.He has already bought enough food. (改为—般疑问句)________ he bought enough food ________?
2.It takes him about two hours to go to school by bus. (对划线部分提问)________ ________ does it take him to go to school by bus?
3.We must use the lift on the right. (对划线部分提问)________ ________ must we use?
4.Kitty likes apple juice because it is sweet. (对划线部分提问)________ ________ Kitty like apple juice?
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