下列各组物质，不能由同一化学反应得到的是[ ]

A.氢氧化钠和氯化铁

B.碳酸钙和氢氧化钠

C.硫酸钡和氢氧化铜

D.氯化钠和硝酸

The headmaster with his students                   Hangzhou Paradise Park if it             tomorrow.

A．is going to; isn’t rainy

B．are going to; isn’t rainy

C．is going to; won’t rain

D．are going to; doesn’t rain