He ()(prefer)Maths to English before he went to college 动词填空...

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He ()(prefer)Maths to English before he went to college 动词填空...
He ()(prefer)Maths to English before he went to college 动词填空...

He ()(prefer)Maths to English before he went to college 动词填空...
preferred 要双写r

prefered

prefered

用过去式preferred
重读闭音节就是指在一个音节中,以辅音音素结尾的而且是重读音节的音节比 (重读闭音节即两个辅音中间夹一个元音),而prefer后面的“er”是一个音节,发“ə:”音且重读,当然是重读闭音节了,所以要双写r。