问题
选择题
____ the tomb, his bird was eaten by a snake.
A．As soon as entered
B．When entering into
C．On entering
D．Upon entered
答案
答案：C
考查”一…就…”的表达：A项是as soon as he entered，B是enter后面不加介词，C项是on doing sth，D项upon entering，句意是：一进入这个坟墓，这个鸟就被蛇吃了。选C。