下列学生习作中语句使用得体的一项是（ ）

The sooner we students 　　　the new school life,the better it will be for our studies.

____ the Internet is of great help, I don’t think it’sa good idea to spend too much time on it.

Not until the party had begun _____. [ ]

The leaders from six countries are discussing whether it is necessary to ____a special committee to deal with the worldwide terror attack. [ ]