The reason Beethoven went away to the country is ______.A.that he was gradually going deafB.because he was gradually going deafC.on account of the fact that he was gradually going deafD.since he was gradually going deaf
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A解析语法结构题。本句的难点是：如果主语是reason，那么后面作表语的从句应由that引导。本句的意思是：贝多芬去乡下的原因是他的耳朵正在逐渐变聋。