It is difficult to ______ a conversation with all this noise around us.A.carry onB.account

______ is quite difficult for Mary to pass the interview.A．WhatB．ThisC．ThatD．It

Some experts believe it is a difficult task to______.A．design new and comfortable devicesB

In "I found it difficult to adapt myself to things around here", "difficult" is the ______

It is difficult for the woman and her friends to change dates because______.A．it"s rather

Is it difficult to learn to_____ Tai Chi？A.playB.goC.do

It was silly______the mistake, which is rather difficult to______.A．of him to make; admitB