Answer:
I'm so sure but it might be
b) In 1970 an army battalion were doing basic training on an enormous plain in the north-west of China. d) One morning a thick fog came down and three soldiers became separated from the others and were reported missing at about ten o’clock. a) A search party went out to look for the men and found them two hours later more than 100 km away. c) They seemed dazed and confused and their uniforms were badly torn. e) They gave the following explanation of what had happened to them during their two hour absence. f) Nevertheless, they were in perfectly good health and did not have any physical injuries.