TOEIC Vocabulary Practice

http://englishtestprepreview.com/toeic-test-your-english/list-check-your-english-practice/1163-toeic-vocabulary-practice

https://www.examword.com/toeic-experience/vocabulary-quiz

http://www.english-test.net/vocabulary/toeic_vocabulary_quizzes.html

600 Essential Words For The TOEIC

 https://www.vocabulary.com/lists/196080

Grammar Rules 

There is no shortcut for learning grammatically correct English. It takes time to understand and put to use the rules of English grammar. But, there are ways to remember the grammar to help you speak correctly.

Try to speak English the way you write it. Spoken English is pretty relaxed and you can get away with grammatical errors most of the time, but it pays to speak correctly. Hence, the golden rule would be to talk just the way you would write it.

https://www.urbanpro.com/a/improve-english-grammar-english-speaking-tips

https://www.fluentu.com/blog/english/english-grammar-tips/

https://grammar.yourdictionary.com/grammar-rules-and-tips/