【題目】Before our study we did not have data that could tell us __ those changes were small or large .

A. that B. how C. when D. whether

【答案】D

【解析】句意：在我們研究之前，我們沒(méi)有數(shù)據(jù)可以告訴我們這些改變的大小。分析句子結(jié)構(gòu)可知“________ those changes were small or large”為賓語(yǔ)從句，并且該從句成分完整，排除在句中作狀語(yǔ)的B、C；that引導(dǎo)名詞性從句時(shí)，沒(méi)有實(shí)際含義，不合題意。whether意為“是否”，符合題目要求。所以選D。

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