⑴I'm listening to music ____           A. but the teacher comes.

⑵Lucy is playing with her dog,____    B. but my friends come to play with me.

⑶The pupils are talking very loudly,____     C. but her mother calls her.

⑷A bus is coming,____                 D. but it starts to rain.

⑸We are having a picnic,____       E. but there are too many people on the bus.

补写下列句子中的空缺部分。

①奚惆怅而独悲？____，____。（《归去来兮辞》）

②老当益壮，宁移白首之心？____，____。（《滕王阁序》）

③外无期功强近之亲，____，____，形影相吊。（《陈情表》）

____________ is very easy.

非洲的地势分布特点是（    ）