【解答】
１
(1)
(a) ① economic
(b) ① attempt to
(c) ② burdensome
(d) ① common
(e) ④ significantly
(f) ④ uncovered
(g) ③ gain
(h) ① elevate
(i) ④ utilized
(j) ③ tensions
(2)
(1) ② of
(2) ② in
(3) ④ to
(4) ② on
(5) ① at
(3)
[X] ① Although
[Y] ③ whether
(4)
A群 ④ Until the recent G20 meeting in Japan, the subject of ageing hadn't been one of the top discussion priorities for the G20 meetings.
B群 ① According to Coughlin, the on-demand economy brought about by younger people's needs has positive impacts on the lives of the older generation.
C群 ③ In Japan, the current older generation enjoys life by taking up the younger generation's trends and activities, such as posting photos online.
D群 ② Germany has been rated triple-A by a major credit rating agency, but it may lose this classification in the future because the ageing population can damage its economy.
E群 ① According to Frey, not only advanced technology but also simple techniques such as rotating workers between different manufacturing stations is effective for reducing workers' physical fatigue.
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