题目内容
A: Excuse me, do you know where the chemistry lab is?
B: Yes. It’s just on the fifth floor of this b____76____.
A: How often do you do c___77____ experiments there?
B: Twice a week.
A: Can you go there without a t___78___?
B: No. That’s not allowed.
A: What does the teacher often tell you to do when you are doing an e____79___?
B: He often tells us to look c____80____ and follow the i____81____.
A: What will you do when you finish the experiment?
B: We must put e___82_____ back in the cupboards and wash our hands.
A: Right. It is very i___83____ to keep the lab clean.
B: Yes, safe as well. We must turn off the e____84____ before l___85___ the lab.
76. building 77.chemical 78. teacher 79. experiment 80. carefully
81. instructions 82. everything 83. important 84. electricity 85. leaving