问题
选择题
---Alice, you look puzzled, Have you understood it?
---Yes.I _____another problem just now.
A.l have thought of
B.am thinking of
C.had thought of
D.was thinking of
答案
答案:D
题目分析:考查时态:根据句意:--Alice,你看起来很困惑,你懂了吗?--是的,刚才我在考虑另外的问题。说明think of another problem是刚刚正在发生。用过去进行时。选D
点评:时态的考查可以从句中出现的时间判断,如果没有就看上下文的句意,判断动作发生的时间。