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ear. After a while, we saw Amy running towards us. “ I’m late there was too much traffic. She said out of breath. … the opera had just started, we did not miss much. The opera lasted for hours. We did not feel bored at all it was really wonderful. becauseSince / As since/as because becauseSince / As Since / As I: Choose the best key. 1. Why was he late for school? ________he got up too late. A. Because B. Since C. As D. For 2. Is David at school today? No, he is at home ______he has a bad cold. A. because B. since C. as D. for 3. ______ everybody knows about it, I don’t want to talk any more. A. For B. Even C. Since D. Because like Han Mei____ she is kind and helpful. A. so B. since C. because D. as A A C C Try to draw a conclusion ? 1. We often use “because” to answer _______ questions. ? 2. We use “because” to introduce clauses of reason which has _______ tone. ? 3. We _______ use “so” in sentences with because. why strongnever Try to draw a conclusion ? 1. We use since/as to give reasons which are already_______. Their tones is _______ than because ? 2. In most cases, _______ are interchangeable(可互換的 ), and we use them in the same way. known w aker since\ as 1. Do afterschool exercises. 2. Preview Integrated skills.