单选题If you work hard  it

问题补充：

单选题Ifyouworkhard,it’snotsodifficult___________you_____________Englishwell.A.of; learnB.for; to learnC.of; to learnD.for; learn

答案：

B解析本题符合句子结构：it‘s+adj +for sb to do sth，故选