尝到苦药时，孩子做了个鬼脸。
The child made a ___grimace when he tasted the bitter medicine.
他看到苦瓜时皱起了眉头。
He ___grimaced when he saw the bitter gourd.
她咬到酸柠檬时，忍不住做了个鬼脸。
She couldn't help ___grimacing when she bit into the sour lemon.
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