Here is the sentence again:

If Chris hopes to survive in his 8 a.m. English class, he needs to discover caffeine even when he has a test, his head hits the desk by 8:05, and snores soon escape his mouth.

The blank space between caffeine and even makes a fused sentence. At this spot, there are two complete sentences joined with no punctuation, causing a major error. He needs to discover caffeine is the main clause of the first sentence. When he has a test, his head hits the desk ... begins the next complete sentence.

To fix this problem, you could put a period after caffeine and capitalize the E that begins even.

Go to the next sentence.

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