It is difficult for him to make such decision.A.happyB.hardC.easyD.simple

It is a big （) for him to do such difficult work.A. courageB. challengeC. opportunit

It is very difficult for a child to adhere to rules.A．rememberB．followC．understandD．learn

It is very difficult for a child to adhere to rules.A．rememberB．followC．understandD．learn

It is not much the language______the cultural background that makes the hook difficult to

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

It is very difficult for a child to 【adhere to】 r