【初二英语】【单选】All the students were sweeping the floor____they heard a man ____ “help”.

题目

【初二英语】【单选】All the students were sweeping the floor____they heard a man ____ “help”.
All the students were sweeping the floor____they heard a man ____ “help”.
A.when,shouting
B.while,to shout
C.when,to shout
D.while,shouting

答案

A.when,shouting
1.when = 就在这个时候（突然）；
2.hear sb shouting help 听到某人在大喊救命
3.所有的学生都在扫地,突然听到有人喊救命.