完成句子（每题1分, 满分5分）
小题1:All the other seemed to know each other and _____________________________
(我感到自己被冷落了)
小题2:_______________________________(值得赞扬的是)the four countries do work together in some areas, but they still have very different institutions.
小题3:Nowadays many farmers ____________________________________________ (想要脱离) farming and make a living in cities.
小题4:Electric trains _________________________________________________(取代)steam trains in England several decades age
小题5:It’s very dangerous ____________________________________________ (暴露于)these virus without any protection
