the extremely hot weather, we continued having classes.
A. Thanks to
B. In addition to
C. In defense of
D. Regardless of
网友回答
A. Thanks to
B. In addition to
C. In defense of
(答案→)D. Regardless of
解析：考查词组：A. Thanks to多亏了，B. In addition to此外， C. In defense of为了保护，D. Regardless of不管，不顾，句意：不管极端的高温天气，我们继续上课。选D。