Some people viewed the findings with caution, noting that a cause-and-effect rel

游客2025-04-08 15

问题 Some people viewed the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remained______.

选项 A、to be shown
B、to have been shown
C、to have shown
D、being shown

答案 A

解析非谓语动词。根据句中的意思可知是一般将来时态，所以应选择动词不定式的非谓语作宾语。故答案为A。

转载请注明原文地址:https://tihaiku.com/zcyy/4031569.html

相关试题推荐

随机试题

最新回复(0)

Astimedevelops,therearemanylargechanginghappeninginpeople’slives.Bei