set off

[    ]

　　A. 动身   B. 建立   C. 释放   D. 外出

She set off early this morning ________ she could catch the early bus．

1. A.
   so that
2. B.
   in order to that
3. C.
   in order to
4. D.
   so as to

They set off _________ the morning of last Sunday.

1. A.
   for
2. B.
   on
3. C.
   in
4. D.
   at

[　　]

A．for　　　B．on　　　C．in　　　D．at