Presumption means that the parties do not express their intentions verbally and in writing, but express their inner meaning to the outside through purposeful and meaningful positive actions, so that others can infer the parties based on common sense, trading habits or mutual tacit understanding. Has expressed a meaning, which makes a legal act possible,. Which of the following are presumed forms? ['After the expiration of the house lease, the lessor still accepts the rent that the lessee continues to pay.', 'After the beginning of the inheritance, the heir did not give up the inheritance, so he was deemed to accept the inheritance.', 'The leaders of Company A and Company B signed the cooperation agreement, indicating that the two parties agree to cooperate.', 'Lee and Yang agreed to go to school together.']