______, the knowledge economy has become the major characteristic of the nationa

游客2023-09-28 44

问题 ______, the knowledge economy has become the major characteristic of the national economy of most developed countries.

选项 A、Once in a while
B、For the time being
C、From time to time
D、Once upon a time

答案 B

解析此题考查短语。once in a while"偶尔"；for the time being"目前，暂时"；from time to time"有时，不时"；once upon a time"从前"。

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