is it difficult to ____tai chi A.do B.go C.play

The question _ too _ for me _. A. isn't;difficult;to answer it B.is;difficult;to answer it parents found it is difficult/it difficult/it was difficult to teach children.说明选择原因 how difficult is it to save money? is it difficult to learn Japanese? _ is difficult for a foreigner to learn Chinese A)that B)how C)it D)this lesson 2 is _ most difficult lesson in Book II,but it isn`t _ most difficult lesson in it it is difficult to do sth对还是it difficult to do sth对 it difficult to do sth 和it is difficult to do sth 的区别 是it is difficult to me to do sth还是it is difficult to me for sth还是it is difficult to me to sth it is difficult to understand.中的it是什么词 it is difficult to do /doingit is difficult 后接to do 还是doing It is often difficult to decide what to RT it is difficult to you to do the job it is difficult to understand.中的to是什么词 Is it difficult for you to get up in the morning?Are you often late for school?Yes?Here is a bed for you.The bed will wake you up!Here is _①_ it works.There is an alarm clock and tape recorder _②_ the bed.When the clock _③_ a sound,you'll have it is difficult it is difficult at I find it difficult to learn English well.这里,为什么不是it is difficult?求解!