2016年9月15日22时04分，我国第一个真正意义上的________——天宫二号，在长征二号FT2运载火箭的托举下奔赴太空。此次成功发射，标志着中国太空科技事业发展迈上新起点。（    ）

—                               ?

—At seven o'clock in the evening.

    Hi, everyone. I'm glad to show you around our city.

Now we are standing at Qingnian Square. ____ It is the white building over there. And it's on Changqing Street. Next to the bank is a bookstore. Many people go there to buy books. Go along Changqing Street.____. It is at the end of the street. Then turn left into Hengshan Road, and our school is on the right____. We sometimes walk along Hengshan Road to go to the swimming pool after class.____ Oh, there is a small river outside the city. ____ It is great fun.

从A, B, C, D四个选项中选择恰当的句子填入文中空缺处，使内容完整，正确。