Reading Comprehension

Hi Eveybody,

Can any one suggest me a good site to practise Readign Comprehension on SCIENCE related passaages.

Iam faring poorly on these passages.

The frustrating this is, on NON SCIENCE passages my accuracy is 80 to 90%. But science related RC passages are pissing me out. Only 50% are coming out as correct answers.

Thanks in advance for the suggetions.

Thanks & Regards
Manoahr