reading,was,when,took,off,boy,a,the,book,ufo,the
reading,was,when,took,off,boy,a,the,book,ufo,the
When the UFO took off ,the girl was waiting for a bus.(变成一般疑
The boy was playing basketball when a UFO l____.
what was the girl doing when the ufo took on?
the boy pretended to be reading a book when the teacher came
The boy was walking down the street when a UFO landed on Cen
1.The boy was walking down the street when a UFO landed.
It took me about a week ( )reading the book. (finish)
The boy is reading a book which was written by Mark Twain 改为
I was reading ____ (A when,B as)the light went off.
I was reading a book ( )the phone rang.A.before B.when C.as
look at the boy reading a book 和look at the boy is reading b