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15．My sister is busy．So she watches TV．（　　）

A．

always

B．

seldom

C．

often

分析我妹妹很忙，所以她很少看電視．

解答答案：B．考查副詞．句意"我妹妹很忙，所以她很少看電視．"．A總是．B很少．C經常．結合語境"我妹妹很忙，所以她___看電視．"，可知，應該是"很少"，用副詞seldom，選B．

點評副詞通常用來修飾動詞或句子，這里修飾動詞，要結合語境，辨析副詞用法，選擇合適答案完成試題．

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