tell the truth,I became a college student at fifteen

1 you do not say so
2 you must be
3 thank goodness
为什么要选1？请帮我解释一下。
请再帮我翻译翻译问题和答案，谢谢啦。

To tell you the truth I shall tell him the truth, ______ . to tell the truth always pays 艾米莉.狄金森诗歌Tell the truth but tell it slant的翻译 You’d rather tell him the truth before it is too late. 64. To tell you the truth, i became a college student at 15. He doesn't think his daughter will tell him the truth,( )? 单选1331,-Why didn't you tell Ann the truth? One who has nothing to fear for oneself dares to tell the truth To tell you the truth,I'm tired of the present situation but I have to ___it.