______ students up to 2, 000 , the school has built another laboratory.
Thefreezingpointisthetemperature__________waterchangesintoice.
Don’t talk about such things _______ you are not sure about.
Hurry! The train _______. You know it _____at 8:30am. .
With the help of high technology, more and more substances _________ in the past years.
Jim is the only one of the policemen in his office who __________ the award.