急！急！汉译英，“咋一看这幅画并不好，但经过仔细观察，我们才发现它是一幅巨作”

This painting was not good at first sight,but we found it a great work after careful observation.

This painting is not good at first sight,but we find it a great work after careful observation.

我上面的对！！！！

This painting was not good sight at first ,but we found it a great work after careful observation.
at first不应放在句中！Believe me！