______ a while, the boy sat there, doing nothing.

[    ]

　　A. By   B. For   C. To   D. With

While she ________ TV, her husband came back.

1. A.
   was watching
2. B.
   watched
3. C.
   watches
4. D.
   would watch

While we________in Australia last summer，I________Lucy who once taught English in our school．

1. A.
   were travelling，were visiting
2. B.
   were travelling，visited
3. C.
   travelled，were visiting
4. D.
   travel，visit

While I ________ with my friend, she came in.

1. A.
   am talking
2. B.
   was talking
3. C.
   talked
4. D.
   am going to talk

While she was talking ________ the phone, her dog met________ dog outside the station.

1. A.
   in; another
2. B.
   on; another
3. C.
   on; the other
4. D.
   in; the other