The new secretary is supposed to report to the manager as soon as he_.a.arrives b.is arriving c.will arrive d.is going to arrive 为何选a 其他错在哪b,d 也有将来的意思,为何不选
问题描述：
The new secretary is supposed to report to the manager as soon as he_.
a.arrives b.is arriving
c.will arrive d.is going to arrive
为何选a 其他错在哪
b,d 也有将来的意思,为何不选
答
as soon as解释为“一…就…”当他引导条件状语从句的时候,主从句时态一直,除非主句是将来时.当主句是将来时的时候,从句用一般现在时.但是,从句一般不会是一般将来时的.