◎我認為John不該用鏈子拴住他的狗。反之，他應該讓牠自由。I don’t think John should (84) his dog. Instead, he should (85)s it (8

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◎我認為John不該用鏈子拴住他的狗。反之，他應該讓牠自由。I don’t think John should (84) his dog. Instead, he should (85)s it (86) .
【題組】84