The research showed beyond ________ that smoking contributes to heart diseases.
A. wonder B. doubt C. problem D. use
The research showed beyond ________ that smoking contributes to heart diseases.
A. wonder B. doubt C. problem D. use
B
beyond doubt为固定短语,意为:无疑,确实。本句句意为:这项研究确实表明吸烟会导致心脏疾病。