问题
选择题
（安徽安庆2009教学质量监测） It is estimated by some experts that by the end of next year we a fall in house prices by 25%.
A．will see
B．see
C．has seen
D．will have seen
答案
答案：D
考察时态，根据句子by the end of next year，可知本句应该用将来完成时。
Cu+CO2 ②MgO+2HCl====MgCl2+H2O
CO2+2H2O
换反应的有_____________。
属于复分解反应的有_____________。