Math is difficult __________ interesting. A.and B.but C.has D.only

题目

Math is difficult __________ interesting. A.and B.but C.has D.only

答案

选B.此句要表达的意思是：数学虽难但很有趣.根据句意空格处要填一个表示转折意义的连词,四个被选答案中C和D不是连词,不符合语法规则被排除；A项为顺承连词,无转折意义,故选B.加油!