Read the text below and answer questions 35 to 40
Adapted from article available at:
https://www.sciencedaily.com/releases/2021/06/210623144901.htm
Accessed on: July 13, 2021.
The words “Although” (l. 25) and “whether” (l. 30) could be replaced, with little or no change of meaning or structure, by the words: