同源重组构建质粒:一道高中英语题.

来源:百度文库 编辑:查人人中国名人网 时间:2024/07/03 09:42:57
____the TV play,he got down to__his homework.
A.Watching ;do B. Having watched; doing
C.Watched; doing D.After his watching ;do
选什么?为什么?

b

因为主语是人he,所以不能用c,get down to后面要用到doing
所以选择b

B