问题补充:
单选题Wewereabouttoleavetheclassroom_____itbegantorain.A.whileB.whenC.asD.before
答案:
B解析be about to do sth. when …正要干某事,这时…。
时间:2020-01-17 14:45:25
单选题Wewereabouttoleavetheclassroom_____itbegantorain.A.whileB.whenC.asD.before
B解析be about to do sth. when …正要干某事,这时…。