- 搜标题
- 搜题干
- 搜选项
单项选择题
He is a quite cautious person. Whenever he decides to do something important, he always has a _____ plan.
A.
He is a quite cautious person. Whenever he decides to do something important, he always has a _____ plan.
A.
backup
B.
backward
C.
work
D.
back
