Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is closest in meaning to the underlined part in each of the following questions.
During the earthquake, a lot of buildings collapsed, which killed thousands of people.
Giải chi tiết:
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.