at a loss

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I wonder what should I do ?
when the kids are so lovely
when the kids ask so much strange questions
" Z3 U& e( {: C" ~7 g: I7 nespecially when they take a exam
( }: Q4 [0 ?* ~; v+ [: P& i* H" Sthe test is so easy,but the result is so bad !
I feel at a loss ,when they know the keys,but they can't write the answer in words!
$ ]$ x0 T& j0 _/ e8 S( e