Flowers and Such *Multiple Pictures*

Here are a few shots I've taken over the past few days. CC is welcome. I'm a 17 year old high school student (hopefully getting a 20d or 30d this summer) who wants to learn as much as possible, so say anything that will help

Thank you for looking.

#1: Frozen in Time...

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Is the first picture too dark?

I like the fourth picture the best. For me, it has interest, all the flowers are in focus, the white looks properly exposed and make a beautiful contrast against the green foliage. The rest are well taken.