The e____is so hard.

E____is not the same in every c_____or in every s____ Work hard so as to finishing the work on time. Sweet is the melody,so hard to come by He worked so hard that he kept up ( )the class I work hard so that I can get the first 句型转换 I study hard so that I can pass the exam I study hard _ I study hard so that I can pass the exam改为I study hard _____ lt is raining so hard that the farmers can ——（hard）continue so far 和so hard working so hard now SO hard 什么意思? i'm so hard