Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
In the early 1900's, Pennsylvania's industries grew rapidly, a growth sometimes accompanied by disputes labor.
Giải chi tiết:
disputes labor → labor disputes (danh từ đứng sau là danh từ chính - noun head, danh từ đứng trước bổ nghĩa cho nó).
Population growth rates vary among regions and even among countries within the same region.
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.