单项选择及句型转换1.All the students were sw
英语
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单项选择及句型转换
1.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
2.He often rus in the park in the morning.(用this time yesterday)
He ____ ___ in the park this time yesterday.