单选题Before painting, we must clean and wash the painted parts with the cleaning solution. （）A在刷油漆之前，应该用干净的棉纱把要上油漆的部分擦干净。B从刷油漆时，我们用水冲洗一遍，再用清洁溶剂。C在刷油漆之前，我们必须用清洁溶剂清洗要上油漆的部分。D在刷油漆之后，我们必须用干净的棉纱把要上油漆的部分擦干净。
单选题
Before painting, we must clean and wash the painted parts with the cleaning solution. （）
A
在刷油漆之前，应该用干净的棉纱把要上油漆的部分擦干净。
B
从刷油漆时，我们用水冲洗一遍，再用清洁溶剂。
C
在刷油漆之前，我们必须用清洁溶剂清洗要上油漆的部分。
D
在刷油漆之后，我们必须用干净的棉纱把要上油漆的部分擦干净。
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