根据句意及汉语提示完成单词（共7小题，每小题1分，共7分）
Would you please keep _____________（寂静）? The baby is sleeping.
We are having a party to celebrate Betty’s ______________（第二十个）birthday.
There are four _____________（季节） in a year：spring, summer, autumn and winter.
I went to the cinema, but my brother _____________ （逗留）at home.
When was the People’s Republic of China _______________（成立）？
We must ______________（设法）to finish the work in an hour.
W____________________（无论什么）you say, I won’t believe you .