A.
PARALLELISM
Which one is parallel?
(A) My English conversation class is made up of Chinese, Spaniards, and some are from Indonesia.
(B) My English conversation class is made up of Chinese, Spaniard, and Indonesian.
EACH ITEM IN A LIST FOLLOWS THE SAME GRMMMATICAL
PATTERNS
Practice 11, part B, p.169

B. Sentence Problems:
B.1. Sentence Fragments  incomplete sentences or part of sentences.
(a) Because some students work part-time a full load of courses.
 dependent sentence only
(b) For example, the increase in the cost of renting an apartment.
 no verb
(c) Feeling lonely and failing most of his classes.
 participial phrase
(d) Many young people who leave home at an early age.
 unfinished independent clause
Practice 12, pp. 170-171

B.2 Choppy sentences  too short sentences. e.g., The computer has undoubtedly benefited humanity. The computer has also created problems for humanity.
Practice 13, p.172

B.3 Run-on and Comma Splices  a sentence in which two or more independent clauses are written one after another with no punctuation.
e.g. We went to Surabaya then we visited the zoo garden.
Why  No comma, period, a semicolon, a coordinator, or a subordinator.
Practice 14, p. 173

B.4 A Stringy Sentence  a sentence with too many independent clause.
Usually connected with and , but , or because .
e.g., He enrolled in an advanced calculus class, but he found it too difficult. he dropped.  change it to complex or compoundcomplex sentences.
After he enrolled in an advanced calculus class, he dropped it because he found it too difficult.
Practice 15, p. 175