1.(C)Although they feel tired ___ they still go on working.
1.(C)Although they feel tired ___ they still go on working. A.and B.but C. D.so (D)2.It's very important ___ eat a balanced diet. A.from B. C.for D.to 请解出这两道题为什么要这样选?说出理由.
第一题选C,因为按照意思解释是虽然他们感觉很累了,但是他们仍然继续工作,但是在英语里面有了Although 就不可以用but不象中文里面可以”虽然....但是...”.关联词不能连用. 第二题选D,在句子中,It充当形式主语,真正的主语是eat a balanced diet,这种句子的结构是lt's(very)+adj(形容词)+to do sth....