I wouldn't place a lot of weight on one practice test.
It sounds like you have a time-management problem. If reading is really slowing you down, you might consider skipping questions that are particularly long. For example, some CR questions have very long passages and long answer choices as well. Even native English speakers have problems completing these questions in a timely manner. If you skip these questions, you might increase your score.
Now I should mention that the best strategy is to read at a fast enough pace so that time is not an issue. However, increasing one's reading speed is easier said than done. So, you might consider the above strategy.
Regarding time management: I suggest that you use a Milestone Chart to keep you on track. This is covered in our free GMAT time management video at
https://www.gmatprepnow.com/module/gener ... es?id=1244
Finally, when it comes to Reading Comprehension (RC), there is not one specific approach that works best for everyone. I always recommend that students spend some time experimenting with different strategies to see which one best suits their memory, reading speed and English proficiency.
When it comes to Reading Comprehension (RC), it's crucial that you engage 100% in the passage. Rather than approach a new passage with dread ("I don't enjoy reading it at all"), try to feign interest ("Excellent! This passage is about stock market regulations in Mexico!"). The better your engagement, the better the results.
You'll find additional tips to help you better engage with the passage in this free video:
https://www.gmatprepnow.com/module/gmat- ... on?id=1123
I hope that helps.
Cheers,
Brent
