问题

Japan’s economy _______ in the past twenty yearsNo one knows how long it ______ before it regains its increase
A:has been declining; will be
B:has declined; would be
C:had been in decline; would take
D:was on the decline; will take
B:has declined; would be
C:had been in decline; would take
D:was on the decline; will take
正确答案是: