他们一起擦洗浴室的瓷砖。
They ___scrub the bathroom tiles together.
她用力擦洗浴缸，直到它闪闪发亮。
She ___scrubbed the bathtub until it sparkled.
他正在用刷子用力擦洗浴缸。
He is ___scrubbing the bathtub hard with a brush.
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