Q171. Choose the best phrase to complete the following sentence:Robert H. Goddard, recognized as one of the founding fathers of rocketry, holds the patents for the invention of liquid-fueled and multi-stage rockets, __________ acknowledged until the dawn of the space age.English — NUST Mock 9 — Question 171 of 200A. but rarelyB. was rarelyC. but had rarely beenD. which had rarely beenE. but he was rarelyPractice more English MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →