We     today not a victory of a party but a celebration of freedom, symbolizing an end as well as a beginning, signifying renewal as well as change.

A．enjoy

B．observe

C．watch

D．suspect

A （） is a pre-contract agreement that formally establishes the intent of one party to buy products or services from another party and establishes some preliminary consideration in order to reserve resources for the anticipated contract．

A．seller initial response

B．memorandum of understanding

C．letter of intent

D．letter contract