MORE TOEFL PRACTICE TESTS [Look at the right side under TOEFL PRACTICE TESTS and click on a category.]
TOEFL VOCABULARY LISTS [LOOK AT RIGHT SIDE UNDER TOEFL PRACTICE TESTS. CLICK ON "VOCABULARY." LOOK AT RIGHT SIDE UNDER TOEFL VOCABULARY. "CLICK ON ACADEMIC WORD LIST." THERE ARE 10 DIFFERENT GROUPS. CLICK ON ONE AND BEGIN.]
The best way to improve your English comprehension, writing, and vocabulary is to read English language books.
Here is a list of recommended books for students whose native language isn't English: BOOKS
If you want to know more about the book, just copy the title and plug it into an Amazon search. You will find a description of the plot and usually some reader reviews.
TRANSITIONS and how they're used
More TRANSITION explanation