描述学校课程与作息安排 — 英语选择题
题目
It's about Tom's school timetable in Grade 7. His first class begins at 8:10 a.m. and each class lasts 40 minutes, followed by a 10-minute break. If Tom has three classes in the morning, the third class ends at _____.
A. 10:20 a.m.
B. 10:30 a.m.
C. 10:40 a.m.
D. 11:00 a.m.