54. What does the teacher not use to protect himself from accidents? A) Gloves B) Goggles C) A robot D) A lab coat 55. What are there on the shelves and desks? A) Vases B) Gadgets C) Test tubes and flasks D) Journals 56. What (unusual) clothes is the teacher wearing? A) A sweater B) A jacket C) A lab coat D) A hat 57. How many pupils are willing to answer? A) One B) Three C) All pupils D) Nobody