... species. a. danger b. variety c. existence d. disappearance VI. Choose the word or phrase - a, b, c, or d - that best completes the sentence. 1. 'Would you like ……….. lunch with us?' `Yes, ... a. should b. ought c. had better d. must VII. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the sentence to be correct. 1. Erosion, which washes away valuable ... typed c. being typed d. been being typed 4. Both domestic and imported automobiles must ……… anti-pollution devices. a. equip with b. be equipped with c. equip by d. be equipped 5. 'Has the...