Complete the text using the correct tense ! (careful, there might be several words in one blank)

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers.

Once upon a time, there (be) a mad professor lab.JPG. He (live) in a remote castle up in the mountains. On a stormy might storm.JPG, he (decide) that his experiment (be) ready. He (work) on a new invention for a long time. He (decide) to create chicken nuggets nuggets.JPG with the chickens he (keep) in a cage for a long time chickens.JPG.

In his lab and with his new machine, he (be) able to transform any natural food into chemically enhanced junk dish.JPG . This crazy Professor (have) another idea, he (think) he could infiltrate every supermarket, every fridge, every canteen, restaurant and café. He (say) he (will) be rich, rich rich.JPG .

He (test) his junk food on himself but before that he (try) it on "his subjects" who looked too healthy according to him heads.JPG . So while he (eat) his junk food test.JPG , he (turn) into a spotty teenager spotty.JPG !