国家开放大学 / 综合英语（2）
正确率：100%
Richard _ _ _ _ , after the man left his house.
a.stood behind a tree
b.entered the house
c.walked around the block again
d.opened the window with a screwdriver
a.stood behind a tree
b.entered the house
c.walked around the block again
d.opened the window with a screwdriver
参考答案：