下列词语字音和字形全都正确的一项是（ ）

I want to buy Mother something ______ for her birthday, but I don’t know what she likes best.

He once worked out a plan for the project; ______, most people didn’t agree to it

Didn’t you have a good time in the party?-Of course I did. As a matter of fact, Ihad such fun that time seemed to_________so quickly.[ ]

Students ___________ remain in their seats until allthe papers have been collected