一道英语题I was doing my homework _______ this time yesterday.填入适
一道英语题
I was doing my homework _______ this time yesterday.填入适当介词
另一问题
Nearly everyone has heard ______ the ghosts, but nobody really heard them. 填入适当介词
说明理由
不是说this,that,those,these前不加介词吗,如
I got up late _______ this morning.
答案是不填介词