1.选A
I'm reading a book written by Mark Twain.
这里book 和write是被动关系,所以要用过去分词
2.选A
busy doing sth 意思是：忙着做某事,相当于busy in doing sth.
practise doing sth.意思是：练习做某事
what are you doing?i'm reading a book by Mark Twain.A.written B.writing C.to write D.write
what are you doing?i'm reading a book by Mark Twain.A.written B.writing C.to write D.write
look!the girls are busy English over there
A.practising speaking B.practising speak
look!the girls are busy English over there
A.practising speaking B.practising speak
英语人气：435 ℃时间：2020-02-02 15:37:18
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