The survey showed that ______ numbers of 15-year-olds were already smoking twent

游客2025-05-09 15

问题 The survey showed that ______ numbers of 15-year-olds were already smoking twenty cigarettes a week.

选项 A、essential
B、steady
C、primary
D、substantial

答案 D

解析 essential本质的。steady稳定的。primary主要的，初步的。substantial大体上，基本上，实质的，坚固的

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Thesurveyshowedthat______numbersof15-year-oldswerealreadysmokingtwent