... an operator answers.a. For help, dial on the line. b. For help, wait for an operator to answer.c. For help, answer the operator. d. For help, stand in line. ... TEST FOR UNIT 8I. PRONUNCIATIONA. Choose the word that has the underlined (letters) pronounced differently ... export 5. a. suburb b. entertainment c. medical d. atmosphereII. VOCABULARY AND EXPRESSIONChoose the one word or phrase - b, c or d - that best completes the sentence or subtitutes for the...