Question

.In our class, when the bell rang and the teacher closed his book, it was a

.In our class, when the bell rang and the teacher closed his book, it was a for everyone to stand up. A. signal B. chance C. mark D. measure

Answer 1

答案a
这题考查名词词义辨析：signal信号，chance机会，mark标志，measure
衡量，句意是：在我们班，当铃响了，老师合上书这是一个信号，说明大家要站起来了。选a。