Please answer the following question: Read the following conversation and answer the question. W: I wonder if Henry is coming. M: We're supposed to be here at eight sharp. He told me he would be here at eight o'clock, and it's already half past eight. W: Perhaps something is wrong with him. Question: How long have the speakers been waiting? - For 30 minutes. - For 60 minutes. - For 90 minutes.
Answer:
For 30 minutes.