If the sun’s rays were entirely _______, there would be dramatic changes in the climate on the earth, and the result could be disastrous to the human race.[ ]

My Ipod is not here. Where ______ I have put it?

He is often the last student _______________ to school.

Sichuan is home to giant pandas, ________ are China’s national treasure loved by people all over the world.

依次填入下列各句横线处的词语，最恰当的一组是（ ）①北京奥运会组委会宣布从2004年开始将先后 新的会徽和吉祥物标志。②如果没有 过人生的酸甜苦辣，又怎么能真正懂得长辈们创业的艰难呢③父亲虽然不是科班出身，但他在外国文学方面的造诣足以使专业人士 。