__________your books —_________in the bookcase.

把下列句子组成语意连贯的语段，排序最恰当的一组是沿着甬道缓缓前行，____________正是这平淡的桂花奉献给人们诱人的芬芳。 ①迎面扑鼻而来的是一股浓郁的奇香，循香寻找其源，方知有桂园 ②两边的法国梧桐像欢迎首长的士兵一样挺立着，高大雄伟 ③树冠像一把巨大的伞，遮天蔽日 ④树干粗壮，孔武有力，树叶迎风起舞 ⑤桂树如同一把撑起的伞，在细细绿叶中隐藏着一簇簇米黄色的小桂花 ⑥沿着鹅卵石铺成的甬道踏入桂园，香味更加浓烈

n environment can help the city bid for the Olympics, which____ will promote its economic development

Never before _________ seen anybody who can play tennis as well as Robert.

Few well-known singers came to theconcert,did they?—__________.Such as Xijun Liu,Jay Chouand Kristy Zhang.