you must be careful when you cross the street.(同义句)
问题描述：
you must be careful when you cross the street.(同义句)
答
在地道的口语中过马路小心不应该用be careful，可以用watch the road
you must watch the road when you cross the street
答
take care of yourself when crossing the street
答
you must be careful the time you cross the street.
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