the driver was at ______loss when _____word came that he forbidden to drive for speeding .

题目

the driver was at ______loss when _____word came that he forbidden to drive for speeding .
A,a;/
B.a;the

答案

B
第一个固定短语be at a loss表示茫然/不知所措
第二个用the是因为后面的that引导的句子是word的同位语,word是特指的那句话,特指要用定冠词.
句子的意思是：当得知他由于超速被禁止驾驶时,驾驶员完全茫然不知所措了.
另外,这个句子缺了一个词,he后面应该有个was,因为是被动关系.