【B20】A．fromB．out ofC．offD．down

【C4】A．fromB．ofC．byD．with

【B2】A．running fromB．jumping offC．stepping offD．keeping from

The home－based business model has been born out______ necessity.A、fromB、ofC、by

A．fromB．ofC．across

【C13】A．fromB．out ofC．ofD．to

【C8】A．fromB．ofC．out ofD．in