YueCuixi________oneofwomenpilotst

发布时间：2020-07-11 02:43:47

Yue Cuixi ________ one of women pilots to take part in the experiments to make sure the re-entry capsule（返回舱）can land safely.













A.used to be












B.used to being











C.is used to be











D.was used to be

网友回答

A解析used to加不定式表示过去常常干某事，现在不再干了。
以上问题属网友观点，不代表本站立场，仅供参考！