This is a difficult world r____ .Can you guess it?

here is r____.can you guess it?所给首字母填空 this problem is not difficult.you can do it ( ). the( )is too difficult.I can't guess it. 用适当的介词填空.This problem is a bit difficult.Can you explain it I can't tell you the r____ why I did that.It is a secret. is there a r____ Why you can not come Can you guess ( )this piece of cloth is? 根据单词的首字母填空 注意形势变化 1.You see,a fog this bad is r____.It gives 连词成句:you,is,can,it,guess,what（?） What is it?You can have three_____(guess) Can you guess what it is 和Can you guess what is it 哪句是正确的. 还 高中英语题i can't work out this problem .it is a most difficult o