Hello Tom!^^ Thank you for submitting your homework today. Here are my corrections:

Tom: Introduce myself by five sentence
Correct: Introducing myself in five sentences

Tom:I like to watch a USA drama about the science.
Correct: I like to watch American television programs related to science.

Tom: I want to speak in Engish fluently.
Correct:I want to speak in English fluently.

Tom: I have many chemical materials and there are many reports.
Correct: I have many chemical materials and I also have a lot of reports.

Tom: My friend is salesperson and he always promote his products to me.
Correct:My friend is a salesperson and he always promotes his products to me.
Explanation:
a. You can put both a/an and the in front of a count noun (salesperson)
b. A singular subject must have a singular verb.

General Comment: Always end your declarative sentences with a period (.). Thank you! ^^ Keep studying!