骑车从甲地到乙地，如果每分钟骑206米，13分钟到达，甲地到乙地的路程大约是多少米？
206×13=2678（米）；
答：甲地到乙地的路程大约是2678米．
The students were singing an English song _____ Mr. Xiang came in the classroom. [ ]
A. after
B. when
C. before
D. as
