长于解毒散结利咽的药物是( )。
A．大青叶B．板蓝根C．野菊花D．鱼腥草E．白头翁
参考答案：B
Recently Peter________to do his homework, and instead insists on wasting his time playing com-puter games, which extremely annoys his father.
A．had been refusing
B．has been refusing
C．was refusing
D．refused
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