单词填空 首字母已给出1.The city is the centre of c____ of the country.

单词填空 首字母已给出
1.The city is the centre of c____ of the country.
2.In m____ times,the environmental pollution has become a serious problem for human.
3.Our students need to get uesd to the r____ changing world of new technology.
4.Nowadays a growing n____ of people throughout the world are fond of learning Chinese.