各位老师好!
NASA’s Mars program was set back when two spacecraft failed up reaching Mars, one ______ (burn) up in the planet’s atmosphere and the other ______ (disappear) after a software failure.
这个句子,我设想了几个答案,请问老师们哪些是正确的,哪些是错的。
第一空:burning; having burned; burned; having been burned
第二空:having disappeared; disappearing
谢谢老师们。