每个选项都指出原因...1.turn on CCTV and you ____ advertisements showi

每个选项都指出原因...
1.turn on CCTV and you ____ advertisements showing happy families .
A.will ofen see B .ofen see C.are ofen seeing D.have ofen seen
2.Don't get off the bus until it _____.
A.have stoped B.stopped
3.How can you possiblely miss the news?it ___on the radio all day long
A has been B.had been c.was D.will be
4.Tim,there is ____Mr wang at the school gate for you .
---I'm in ____bath
A.a ,the B.the ,a C.a ,/ D.the ,/