1．(2017·北京卷)Artificial intelligence (AI) may become extremely good at __________ (achievement) something other than what we really want.
[答案] achieving
2． A study found that a strong Nino in 1987－98 helped America's __________ (economic) grow by $15 billion.
[答案] economy
3． I was __________ (delight) at the presence of such a student.
[答案] delighted
4．One traditional __________ (believe) about television is that it reduces a child's ability to think and to understand the world.
[答案] belief
4． Yet there is __________ (evident) suggesting that the trend is growing.
[答案] evidence
6． To catch the early __________ (fly), we ordered a taxi in advance and got up very early.
[答案] flight
7．It might seem odd, but it is a __________ (culture) tradition.
[答案] cultural
