公共英语一级
单选题第50题选
A．worded
B．to worry
C．worrying
参考答案：B进入在线模考
本题考查的是固定句型的用法。there is no need doin gsth．表示“干…没必要”。there is no need to do sth．表示“(客观上)没有必要做某事”。根据上下文可知，妈妈告诉儿子没必要担心。故B正确。
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