摘要：11．原因句型 He didn't go to school because he was ill. Since we are all here, let's begin our meeting. It might rain yesterday, for the ground was wet. Now we have finished the work, we can go home. I am glad to meet you. I am sorry that I hear you have been ill. I owe you a lot of thanks for your kindness to me in all these years. That is why he failed to come. He didn't come because of/ on account of the weather. He went out of curiosity. I succeeded thanks to his help. This failure is due to the fact they lack experience. Owing to our joint efforts, the task was fulfilled. For what reason did you choose this? What's the point of asking him to do that? How come you never told me about it? What with the wind and what with the rain, our walk was spoiled.

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