. _________ in the regulations that all the people involved should follow the instructions.
____ the TV play, he got down to ____ his homework.
—Will you go skiing with me this winter vacation? --- It __________________.
I lost my way. I wonder ________ I can turn in the dark.
—Do you mind if I keep pets in the building? --- _________________.
The fire ______ at might was still seen ______ the next morning.