Choose the correct phrase to make each sentence parellel alice worked hard to ensure that her presentation was a) creative , persuasive , and effective b) creative , persuading , and effective c) creative , persuasive , and effectively the teachers like john because he a) has been coming to class on time , participates in class discussion , and submits his assignment before the deadlines. b) comes to class on time , is participating in class discussion , and is submitting his assignments before the deadlines. c) comes to class on time , participates in class discussions , and submits his assignments before the deadlines

1. The correct answer is A) creative, persuasive, and effective. A parallel sentence structure means that you should use the same grammatical forms of words that are parallel in meaning. In this case, you want to say that Alice's presentation was (fill in with adjectives). It is obvious that it requires adjectives - words that describe the noun. So, it can't have present participles (such as persuading) or adverbs (such as effectively). All of these words have to belong to the same grammatical category - and that's adjectives.

2. The correct answer is C) comes to class on time, participates in class discussions, and submits his assignments before the deadlines. In this case, we need parallel verb forms. All the verbs need to be in simple present tense. You can't have the intrusion of present perfect continuous (has been coming), or the intrusion of simple present in what is a succession of actions in present continuous (the B option).