Superglue is for you :)  ==> 1 class
Task 2:

Put the verbs in brackets in the past simple or past continuous tense.

Many people  reach for Superglue  when  something breaks at home as it can bond materials like rubber, wood, ceramics and even metal. Superglue (0) came (come) into being in 1942 while Dr Harry Coover of Kodak Laboratories (1)                                              (try) to make a special extra-clear plastic suitable for some parts of guns. One day he was in his lab and he (2) _____________ (conduct)  an  experiment   when  he  (3)                  (discover) a strange sticky substance. As it was not good enough for his purposes, Dr Coover (4)                                    (continue) his research.  He (5)                     (not think) about  it until several years later, when he (6) ___________(work) in a chemical plant. While they  (7)                       (test) the  substance  they  found  out  that  it (8)    (glue) different materials together immediately and with great strength. Soon Kodak (9) ____________ (develop) the first extremely strong ‘super glue’. To prove its qualities, Dr Coover (10) __________ (use) a single drop  placed  between two steel cylinders to lift the  host of the TV show ‘I’ve Got a Secret’, completely of  the ground