_______ , sound and video can now be stored on a PC, on the Internet, or using some form of portable storage. Which one of the following is not suitable

88. We are determined to build our country into a prosperous and _______ socialist country.

.There was so much noise in the room thatthe speaker couldn’t make himself

.— Are you going to stay overnight? — Not__________it’s really necessary

Could you tell us how long ________ —About three days.