2 . The network of China’s high-speed train is much longer than ______ in Japan.

A．one

B．that

C．it

D．this

3 . ________is now clear that they need conservation efforts. (用适当的词填空)

4 . Born in France, she returned from Paris with her father and devoted________ (they) to the cause of cultural heritage. (所给词的适当形式填空)

5 . Eager to show their personalities to the world, young people find national identity a good way to distinguish________ (they) from others, and culture is the perfect medium to explain why young people are passionate about traditional culture. (所给词的适当形式填空)

6 . China’s cargo spacecraft, Tianzhou-5, is ready for ________ (it) launch, according to the Wenchang Spacecraft Launch Site, under the Xichang Satellite Launch Center, in China’s southern island province of Hainan. (所给词的适当形式填空)

8 . 如果您能尽早回复我，我将非常感激。
________________ at your earliest convenience.

10 . 最近在线学习被公认为是一种重要的学习方式。
a. Online learning ________________ an important way to study recently.
b. ________________ . (用it作形式主语)