What did Frank and his father do yesterday?
A:They went to the library.
B:They went swimming.
C:They played chess.
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美国当地时间2017年2月4日晚,美国国土安全部发表声明,根据联邦法官裁决,全面暂停实施总统特朗普颁布的入境限制令,恢复此前对待入境旅客的检查方式。这一事件说明( )