Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 1.Biogas is plentiful and can be renewed easily. (plentiful) A. exhaustible B. available C. abundant D. limited 2.Tet Holiday is the most important festival in Vietnam which takes place in late January or early February. (takes place) A. appears B. happens C. brings D. finishes 3.Once we use up non-renewable energy sources, they are gone forever.(use up) A. make B. install C. clean D. run out of 4.We offer quality products at affordable prices. (affordable) A. high B. expensive C. reasonable D. comfortable 5.The deal is about to make him a very wealthy man.(wealthy) A. successful B. poor C. rich D. colourful