In such heated air, the（ ）students could hardly keep their minds on their lessons.
A、fascinating
B、entertaining
C、thrilling
D、sweltering
【正确答案】：D
【题目解析】：本题考查词义辨析。fascinating：迷人的；有吸引力的；entertaining：愉快的，有趣的；thrilling：令人紧张的；sweltering：炎热的，酷热的，热得难受的。句意：在这样热的空气中，闷热的学生们几乎无法集中精力学习。故D选项符合题意。
