According to Paragraph 5, raising some cuckoo chicks in the nest will ______.
A. draw enemies to it
B. attract birds of prey
C. have no benefit at all
D. protect it from predators
查看答案
We can learn from Paragraph 4 that______.
A. ships without crew will soon replace traditional ones
B. most air crashes are caused by operational mistakes
C. erewless ships are favoured just because of safety
D. human hands are more reliable than computers
【C19】
A. which
B. there
C. where
D. that
Ships with crew are more costly mainly because of______.
A. pay and accommodation for sailors
B. hotel facilities needed on board
C. expenditure on more fuels
D. heating and plumbing
微信支付 
支付宝支付