Which group of sentences best uses a variety of sentence patterns to convey meaning and the relationship between ideas? He went to his friend's house today. They played a lot of games. He enjoyed playing the games.

He went to his friend's house, and he enjoyed it. He did a lot of fun things, and that happened today.

He went to his friend's house, which he enjoyed. They played a lot of fun games, which he also enjoyed.

Today, he went to his friend's house. He enjoyed his time there because they played a lot of games.

Today, he went to his friend's house. He enjoyed his time there because they played a lot of games.

Explanation:

The fourth sentence is the most fluent and does not repeat useless information like some of the other answers.

like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.