问题

quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.

A:concerns
B:descriptions
C:catastrophe
D:emergency;

正确答案是：

同类题型

_______ in doing his homework , he didn’t know I had walked in.

ook has helped me greatly in my daily communication, especially at work ________ a goodimpression is a must.

The money we made last year_____150million.

How do you do — _______

nistry of Foreign Affairs speaker explained what was happening in Hongkong ________, which clearly showed China’s firm attitude.