根据要求完成句子。
1. Tom doesn't know how he can get to the post office. ( 变为简单句)
.
2. Is there a department store near here? Could you tell me? (合并为一句)
__ .
3. When will the train arrive? Please tell me. (合并为一句)
__.
1. Tom doesn't know how to get to the post office.
2. Could you tell me if/whether there is a department store near here?
3. Please tell me when the train will arrive.