问题
选择题
________ he could call the police, the thieves had run away with the suitcase, leaving him shocked and helpless.
A．Before
B．Until
C．Because
D．Unless
答案
答案：A
A 考察连词。句义：他还没有来得及报警，小偷已经带着手提箱逃跑了。这使他感到震惊和无助。Before在…之前发生。A正确。
