The traffic was held up for more than thirty minutes, ________ caused me to arrive late.
D
非限制性定语从句引导词的选取。
TheFrenchmaintaina________separationofpersonalandprofessionallife.
Therearemanysalesthisseason,duringwhichstoreswilllowertheir_______prices.
So far scientists have only acquired ________ understanding of the physical processes that cause earthquakes.