为你解答.
The old man looked for his ticket in all his pockets. 改为一般疑问句
Did the old man look for his ticket in all his pockets?
(About half an hour later,)the conductor began to see the tickets. 对框出来的部分提问
When did the conductor begin to see the tickets?
为你解答.
The old man looked for his ticket in all his pockets. 改为一般疑问句
Did the old man look for his ticket in all his pockets?
(About half an hour later,)the conductor began to see the tickets. 对框出来的部分提问
When did the conductor begin to see the tickets?