【題目】I didn’t understand ________ so I raised my hand to ask.

A. what my teacher says

B. what does my teacher say

C. what my teacher said

D. what did my teacher say

【答案】C

【解析】

試題分析：句意：我不理解老師說的話，所以我舉手提問。賓語從句的結(jié)構(gòu)：主語+謂語+連接詞+從句。從句在句中作賓語。從句要用陳述句的語序。如果主句是一般現(xiàn)在時，從句根據(jù)需要選擇時態(tài)，如果主句是過去時態(tài)，從句要用相應(yīng)的過去時態(tài)。但是從句是客觀真理，一般用一般現(xiàn)在時態(tài)。所以答案選C。

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