Japan’s economy in the past twenty years. No one knows how long it before it regains its increase.A.

【题目】Japan’s economy in the past twenty years. No 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

【答案】A

【解析】

试题分析：考查时态辨析。根据句意和时间指示词in the past twenty years和介词before 可以判断前后应该分别采用现在完成进行时和一般将来时。句意：日本经济在过去20年里一直在下滑。谁也不知道在它恢复增长前还需要多长的时间。根据句意可以判断， 故选A。