<span>Mark Twain was impressed by the river chariots in Hannibal and deeply desired to someday, become a steamboat captain. Twain eventually managed to acquire an apprenticeship with a steamboat captain.
In Twain's writing of the Mississippi river that borders Hannibal, he claimed that he was highly impressed and fascinated by the Mississippi river itself, its immensity as well as the people/ workers who populated the steamboats on the river. </span>
I would say using a comma to combine the two sentences.
That is true. Because you will not comprehend what the sentence/ words are saying, because you only care about getting it written down. So multitasking reading and writing at the same time is not a good idea :)
He was afraid that he world be late for school
A security guard. He has to be alert and watchful during all his shift at work