这是在考定语从句吗?先行词是什么呢?It was 1969___ the American astronaut succ

这是在考定语从句吗?先行词是什么呢?It was 1969___ the American astronaut succ 初中定语从句It was in 1969( )the American astronaut suceeded in la 26.It was in 1969 __________ the American astronaut succeede Was it in 1969( )the American astronaut succeeded ( )landing it was 1.It was in 1969 _______ the American astronaut succe 这个句子是定语从句吗,先行词是什么? 这句定语从句中,先行词在从句中作什么成分?是定语从句吗? 1.It was in 1969 __A__ the American astronaut succeeded in l 1.It was in 1969 _______ the American astronaut succeeded in It was in 1969 that the American astronaut succeeded in land It was in 1969 _______ the American astronaut succeeded in l 1、was it in 1969( that )the American astronaut succeeded in