选出不同类的一项(    )

如果 是方程组 的解，则m=____，n=____．

根据短文内容及所给首字母提示，写出所缺单词，使短文完整、通顺。

Can you think of ways to make the world greener? Here is an e____ . A couple have travelled around the world in 297 days — w____  taking any planes.

Tom Fewins and Lara Lockwood u____  78 buses, 61 trains, 34 cars, 18 boats, 6 bicycles, and even 1 elephant. They wanted to prove (证明) that t____ can still travel well without damaging (破坏) the environment. They thought they could p____ less than 3,000 kg of carbon dioxide (二氧化碳) if they didn’t travel by plane.

They spent ten months travelling 44,609 miles t____ 18 countries on land and sea. The couple’s tour b____ in June, 2008 with a two-hour bus trip to London from their home in Oxforshire. They t____ the train to Brussels and then caught a bus and train to Hamburg. The couple even r____ on an elephant for 15 miles to go through the Chinese part of the Mekong River.

The couple hoped to write a book based on their j ____ . They thought it would teach other travellers how to travel in a green way.

阅读下面的文字，完成小题。

瑞鹧鸪

(南宋) 张元幹

白衣苍狗变浮云，千古功名一聚尘。

好是悲歌将进酒，不妨同赋惜余春。

风光全似中原日，臭味要须我辈人。

雨后飞花知底数？醉来赢取自由身。

【注】胡铨（字邦衡）贬到新州以后，继续写了一些慨叹国事的词作。这些词作通过彭德器传到了张元幹手中。他读后感慨万千，情不自禁地写下这首和韵词。