1.He___a lift to go up and down(用) 2.He improves his English__asking teachers for help.(用)

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1.He___a lift to go up and down(用) 2.He improves his English__asking teachers for help.(用)

1 takes
2 by
1 他乘电梯上(楼)下(楼)、
2 他通过向老师寻求帮助来改善自己的英语.