Question

It took more than twenty years for the great artist       _the painting was finished completely.

A．as

B．before

C．after

D．when

Answer 1

B

试题分析：句意：在这幅绘画完全完成之前，花费了这位伟大的艺术家20多年的时间。As作为； before在……之前 ；after在……之后 ；when当……时候，选B。