在图所示的电路中，电源电压6V，闭合开关后两灯均不发光，用电压表测量点路中a、 b间电压为0，b、 c间电压为6V，则电路中的故障可能是(  ).

阅读下面短文，根据语境、音标或所给单词的提示，在每个空格内填入一个恰当的词，要求所填的词意义 准确、形式正确，使短文意思完整、行文连贯。

    The Chongyang Festival is a Chinese traditional festival. It is celebrated on the ninth day of the ninth lunar month. It's also____(call) the Double Ninth Festival.

    The festival started as____/'ɜ:li/ as the Warring States Period (475—221 BC) . It has a history of more than 1,700 years. Among the numbers from zero to nine, nine is the____(high) odd number (奇数). People believe that two "nines" meeting together stand for a long life. So it is a special holiday____Chinese people to show love and respect for their elders. They hold many____(kind) of activities in honor of old people, wishing them good____/helθ/ and a long life.

    The festival comes during the golden time of____/fɔ:l/. On the day, people traditionally drink chrysanthemum (菊花）wine, eat Double-Ninth Cakes____climb mountains. They also carry a kind of plant named dogwood. People in ancient times believed that ____plant could drive away evil (邪恶的）spirits and prevent them from____(catch) an illness in winter.

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②____

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