一道英语时态问题
题目
一道英语时态问题
I'm rather tired;I __ since this morning.
A was doing housework B have done housework C did housework D have been doing housework
选哪个 为什么
答案
I'm rather tired;I __ since this morning.
我非常累,从早上到现在一直在做作业;
选D
A was doing housework B have done housework C did housework D have been doing housework
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