A Colorado woman said that her iPhone 4 fire while charging overnight.
A. had caught
B. has caught fire
C. was catching
D. caught
网友回答
A. had caught
B. has caught fire
C. was catching
(答案→)D. caught
解析：考查宾语从句的时态。主句用的是过去时，从句也要用相应的过去时态。句意“一位科罗拉多女性说，晚上充电时她的iPhone4着火了”。这里说的是事实，从句用过去时。catch fire“着火”。故选D。