问题
选择题
---- What did Jack eat?
---- He ________ an apple before he ________!
A．ate; sleeps
B．had eaten; slept
C．eats; was sleeping
D．has eaten; slept
答案
答案：B
题目分析: 句意：杰克吃的什么，他在睡前吃了一个苹果。\eat 吃，sleep睡觉，根据What did Jack eat可知答句时态为过去时态，吃苹果与睡觉有时间先后，过去的过去用过去完成时，故选B。