2.乘公共汽车通常要花半个小时The bus ____ usually ____ half an hour.

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• 2.乘公共汽车通常要花半个小时The bus ____ usually ____ half an hour.
• He usually takes the subway to work.（改为同义句） He usually goes to work—— ——.1.He usually takes the subway to work.（改为同义句）He usually goes to work—— ——.2.I do my homework after dinner for two hours.（改为同义句）——takes me two hours—— ——my homework after dinner.翻译1.我每天花费十五分钟乘公共汽车上学.2.我通常花费半个小时做作业.3.里奥怎样到达火车站?4.到你祖父母家需要多少时间?5.北京到天津有多远?6.我家离学校有四百米.Bob has to do his homework at home.（改为否定句）He（does his homework）every day.（对括号内提问）You can‘t run in the hallways.（改为同义句）
• 在△ABC中，角A，B，C所对的边分别为a，b，c，且sin(A+B)cosAsinB＝2c/b． （1）求角A； （2）已知a=7/2，bc=6，求b+c的值．
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