Jamie had never been sledding before. is before being used as an adverb or propistion

Which conclusion about the eldest magician does this excerpt support

Write a review of the first part of american born chinese that explains your opinion on the effectiveness of two different plot elements

During an experiment measuring the change in temperature of a chemical reaction your digital thermometer breaks. you have the same model thermometer available to use how do you proceed with the experiment a. continue on with the new thermometer b. begin the experiment again with the new thermometer c. calibrate the new thermometer and make a notation regarding the change in equipment d. calibrate the new thermometer and begin the experiment again