回族的著名的节日是（）。
A.开斋节
B.春节
C.端午节
D.古尔邦节
参考答案：A
—Do we have to wear our school uniforms tomorrow?
— I think so. We _____ the coming-of-age ceremony in the afternoon.[ ]
A. will be attending
B. have attended
C. attend
D. attended
天然气是由（）化合物为主的各种气体组成的混合气体。
A、碳氧
B、碳氢
C、氮氧
D、硫氮
