Because the driver was not ________ the new limit, he was stopped and warned for speeding.[ ]

As the day of the examination _____, almost all of the students are busy making preparations.

I’m _____ at sums than Jean, but better at history.

下列各句中，语言表达得体的一项是（ ）

Research universities have to keep up with the latest computer and scientific hardware __________ price