With so many difficult problems ______, the manager felt worried all the time.
There are no running races or horse riding events in the Winter Olympics ._______there are competitions like skiing and ice skating .
She could not speak ,nor ______anything we said .
Why many adolescents have trouble communicating with their parents lies in _______we call “generation gap .”
I _______less than a pound a week when I first started work .
_______the cost ,the project will take a lot of time as well .