题目内容:
When should the teacher issue the instruction?
A.As soon as class begins
B.When students’attention is directed to the teacher
C.When class is silent
D.When class is going to be over
参考答案:
答案解析:
When should the teacher issue the instruction?
A.As soon as class begins
B.When students’attention is directed to the teacher
C.When class is silent
D.When class is going to be over