1.One recent prediction is that within the next 50 years,it possible to link the human brain directly with a computer.

1.One recent prediction is that within the next 50 years,it possible to link the human brain directly with a computer.
A.is B.will be C.would be D.was
2.These interesting articles were written by Anna,who _ for our magazine these years.
A.wrote B.would write C.is writing D.has been writing
3.He’s got our tickets.
---That’s good.I__ afraid that he __ them.
A．am; has forgotten B．was; had forgotten
C．was; forget D．am; will forget
4._________ a time in the 1960s when young people liked wearing army uniforms.
A.It was B.There was C.It is D.There is
5.-- Sorry we’re late.We _____ the wrong turning.
-- That’s all right.Come in,please.
A.take B.have taken C.took D.had taken
6.The novels written by the author sell best,but five years ago no one could have imagined how great a role he ______ in the literary world.
A.was playing B.played C.was to play D.had played