一、根据句意及首字母或所给词的适当形式填空
1． Our classroom is big and b_____________. We feel comfortable in it
2． I think spring is the best s___________ of the year.
3． We all c_________ down from ten to zero.
4． We all promise to w_________hard and h________ each other more.
5． Today is Susan’s ______________ birthday.(fifteen)
6． It’s very ___________ here, Please keep quiet.(noise)
