题目

演员们在阵阵“烟雾”中翩翩起舞，这“烟雾”是由于向舞台喷洒的大量干冰粉末迅速吸热，气温降低，致使水蒸气 而成的。 答案：【1】升华【2】液化1. I think Canada will win the next World Cup. (就画线部分提问)   ________  ________  ________you think________  ________ the next World Cup?2. Jack didn't go to school because he was ill. (就画线部分提问)    ________  ________Jack go to school?3. I think there will be more pollution. (改为否定句)    I_______ think there________  ________ more pollution.