A contract is an agreement between two or more people 【71】 one person agrees to do somethi

ng by a specified date in return for something done by 【72】 Usually the contract is a written document signed and dated by both 【73】 It must state clearly the consideration, that is, what is to be given or done by one person in 【74】 for what is given or done by the other . If one person does 【75】 was promised and the other does not, that other may be sued in court and required by court in order to make compensations. He or she 【76】 also be required to pay for damages suffered as a result of the failure to perform. The things 【77 】by both parties must be stated in definite terms 【78】 the court will hold that contract is 【79】 vague and general to be enforced. 【80】 the time period within which the work is to be done must be definite or the court will say that the document is not a contract.

(71)

A．in which

B．that

C．which

D．on that