选出合适的选项将单词补充完整,并写出汉语意思。(1)bec__se A、or B、au C、al ________________(2)b___thday A、ir B、re C、or _______________(3)un___e A、on B、vn C、cl ________________(4)p__no A、io B、ia C、oi _______________(5)m__ntain A、ou B、uo C、au _______________
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