.Science and engineering students often _____ their heads in books instead of going to dances and cinema.
If he refuses to _____ my plan, I can probably find someone more cooperative.
In my opinion, you can widen the _____ of these improvements through your active participation.
While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
The lawyer was expected to _____ some proposals after reading all those documents.
_____ his knowledge of the mountainous country, John Smith was appointed as our guide.