my sister and l ______good at English A .both are B.are both

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mysisterandl______goodatEnglishA.bothareB.arebothmysisterandl______goodatEnglishA.bothareB.arebothmy

my sister and l ______good at English A .both are B.are both
my sister and l ______good at English A .both are B.are both

my sister and l ______good at English A .both are B.are both
B
both,all 等做主语的同位语时要放在be 动词后面