Listening Exercise DIY Centrifuge

Listening Exercise DIY Centrifuge Today youll see an interesting video about how scientists have made a medical tool out of a simple childrens toy.  Its amazing to see how theyve solved the problems  that prevent many remote villagers from receiving medical care-cost and electricity.  Take a look at the short video, and strengthen your listening comprehension with the  questions that follow.Scientists ____ ____ paper and string to make a centrifuge that could be used for medical tests in remote locations.Question #1 used present perfect for which of the following reasons?experiencechange over timeaccomplishmentincomplete, expected actionBut centrifuges are _____________ bulky and expensive and need to be plugged in.What else needs to be plugged in?In the quest for an affordable, electricity-free centrifuge, scientists ____ previously ____  use of a salad spinner, but this design is relatively slow.To make use of is a phrasal verb that means to use something for your own purpose.  What have you made use of today?No w, scientists at Stanford ____ ____ ________ by a simple childrens toy.What can the centrifuge be made out of?What have you been inspired by recently?They studied the mechanics of the toy to work out how to achieve the _______ possible spin.As always if you write your answers in comments well correct them for you and even give you an explanation!