The whole class applauded wildly at the end of the speech, ______ greatly encouraged Bob.

A. what B. where C. which D. when

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While astronauts in space get to do many exciting things, they miss out on ordinary things that we all take for granted—being able to walk on firm ground, hanging out with family and digging into a slice of hot steaming pizza. Though not much can be done about the first two things, there may soon be a solution to the third one, thanks to this cool 3-D pizza printer!

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