2道高中英语单选求解析1.—Was the flight late again,Tim?—luckily,no.I hadn‘t waited long()my wife arriveA.until B.before(为啥不选until)2.Only when the computer came into being ___was there____ any possibility that man could start his journey far into outer space.（为什么不能用was it）

2道高中英语单选求解析
1.—Was the flight late again,Tim?
—luckily,no.I hadn‘t waited long()my wife arrive
A.until B.before(为啥不选until)
2.Only when the computer came into being ___was there____ any possibility that man could start his journey far into outer space.（为什么不能用was it）