at a loss

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I wonder what should I do ?
- D7 t: c9 b5 E) M& o6 Cwhen the kids are so lovely
when the kids ask so much strange questions
- u4 Y/ y  `' P$ c# ^: k+ N" J- f% d+ tespecially when they take a exam
4 l% R0 ^7 @9 L6 r! X2 Rthe test is so easy,but the result is so bad !
7 f& Y& v) e# [I feel at a loss ,when they know the keys,but they can't write the answer in words!
7 i! d# O, y3 K7 b. B3 g: f& o