Question

This problem may _______ more serious ones if left unsolved.

A．come across

B．refer to

C．carry on

D．lead to

Answer 1

D

考查短语辨析。come across 偶然发现，refer to涉及，参考，carry on 继续，lead to 导致，句意：这个问题可能会导致更严重的问题如果留下不被解决的话。所以选D。