只有解决好()问题，才能持续扩大国内需求，增加有效供给，促进就业，推动城乡、区域协调发展。

A．产业结构

B．经济发展

C．经济结构

D．经济体制

--- Why were you late for the class, Jenny?

--- Oh, my clock must be running slow, and it needs ____.

A．suiting

B．adapting

C．fitting

D．adjusting