________ are you looking for， madam？ I think everyone is here．
I don't think so． Where's David？（ ）
A．WhoB．WhatC．WhenD．Where
________ are you looking for， madam？ I think everyone is here．
I don't think so． Where's David？（ ）
A．WhoB．WhatC．WhenD．Where
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