He can't swear (to having,to have) locked the door.选哪个?
1.He can't swear (to having,to have) locked the door.
2.He has sworn (speaking,to speak ) the truth.
分别选什么?
人气：164 ℃ 时间：2020-03-27 04:29:57
解答
to having 他不敢断言锁门了 to 是介词
to speak 不定式.他发了誓要讲实情
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