选择题

　　1. What is the missing word in the sentence "the milk ____ in his room"?

• • a) was
  • b) is
  • c) are
  • d) were

　　Correct answer: a) was

　　Explanation: The correct verb to use in this sentence is "was" because it indicates that the action of the milk being in his room has already happened in the past.

填空题

　　2. Fill in the blank: The milk ____ in his room.

　　Correct answer: was

　　Explanation: The sentence requires the past tense of the verb "to be," which is "was," to indicate that the milk was in his room in the past.

判断题

　　3. True or False: The milk was in his room.

　　Correct answer: True

　　Explanation: According to the given sentence, the milk was indeed in his room.

论述题

　　4. Discuss whether it is appropriate to keep milk in a room.

　　Answer:

　　It is generally not appropriate to keep milk in a room for an extended period of time. Milk is a perishable food product that needs to be stored at a proper temperature to prevent spoilage and the growth of harmful bacteria. Keeping milk in a room, especially without refrigeration, can cause it to spoil quickly and become unsafe for consumption. It is important to store milk in a refrigerator to maintain its freshness and quality.

　　Explanation: Storing milk in a room without refrigeration can lead to bacterial growth, which can cause the milk to spoil and become unsafe to consume. Refrigeration helps to slow down the growth of bacteria and extends the shelf life of milk. Therefore, it is best to store milk in a refrigerator to ensure its safety and quality.

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