问题补充:
—Where were you at eleven o’clock this morning?
—I beef with my father at home at that time.
A. cook
B. am cooking
C. was cook
D. was cooking
答案:
A. cook
B. am cooking
C. was cook
(答案→)D. was cooking
解析:句意:-今天早上11点的时候你在哪里?-那个时候我正在家里和我的爸爸做牛肉。根据句意可知,这里说的是今天早上11点钟的时候发生的事,应该是说当时我正在做牛肉,故应该用过去进行时。故选D。A选项是一般现在时;B选项是现在进行时;C选项的形式不对。