关于合同法的问题！急急急急急急

选择题1,The only persons who can acquire rights and incur liabilities under a contract are the parties to the contract,This is known as the doctrine of()A,privity B,veil of incorporation C,promissory estoppel2,An option is a/an()A,contract B,offer C,counter offer D,acceptance3,()consideration is not valid.A.present B.future C.past D.sufficient4,Under common law,()occurs where a person uses a position of influence to persuade someone to enter a contract that provides the stronger person with a direct or indirect benefit.A.mistake B.undue influence C.unconscionable conduct D.duress5.You promise to pay me $10000 for my car withim seven days and i promise to transher the ownership pf the car to you at that time,This is a/an()contract.A.executed B.executory C.quasi D.formal6.Company has a legal personality, this principle was established in()A.Carbolic smoke ball case B.Lee v Lee✀s Air Farming Ltd case C.Salomon✀s case7.A life insurance contract was()because the person paying the premium and the insurance company wrongly believed that the person being insured was alive when they made their agreement.A.valid B.illegal C.voidable D.void8下列不适用我国《合同法》的合同有（）A买卖合同 B租赁合同 C收养合同 D赠与合同9下列具有法人资格的组织有（）A个人独资企业 B合伙企业 C分公司 D子公司10根据我国《合同法》，对于可撤销的合同，具有撤销权的当事人自知道或者应当知道撤销事由之日起（）没有行使撤销权的，撤销权消灭。A半年 B一年 C 二年 D三年