SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 4 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation. What can we infer from this discussion
A．That Bob does not get along with his lab partner. B．That the students performed the experiment correctly. C．That the students had problems, and could not complete the lab experiment. D．That there was a fire in the lab during the experiment.