1.This marked the beginning of the “space race” between the US and the USSR,which ended _________________ a man on the moon in 1969. 这标志着在美国与苏联之间的“太空竞赛”开始了,这场竞赛以美国在1969年把人类送上月球而告终。 2.It was launched in 1990 __________ astronomers could observe space without the Earth's atmosphere being a barrier. 它于1990年被送入太空,以便天文学家观测太空时能不受地球大气层的阻碍。
with the US putting
so that