【題目】 Some experts thought that the standards of education __________ these years in China.

A. has declined B. had declined

C. has raised D. had raised

【答案】B

【解析】

試題分析：B考查動詞的時態(tài)語態(tài)。分析句子，that引導(dǎo)的是賓語從句，從句中的動作發(fā)生在主句謂語thought之前，故用過去完成時，表示動作已經(jīng)完成，并且對現(xiàn)在造成了影響。故答案為B選項。

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