he'll send us a message as soon as he ___ in Sichuana.is arriving b.will arrive c.arrived d.arrives选哪个 为什么

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he'll send us a message as soon as he ___ in Sichuana.is arriving b.will arrive c.arrived d.arrives选哪个 为什么

he'll send us a message as soon as he ___ in Sichuana.is arriving b.will arrive c.arrived d.arrives选哪个 为什么
he'll send us a message as soon as he ___ in Sichuan
a.is arriving b.will arrive c.arrived d.arrives
选哪个 为什么

he'll send us a message as soon as he ___ in Sichuana.is arriving b.will arrive c.arrived d.arrives选哪个 为什么
d.arrives
as soon as 引导的状语从句.
主句用一般将来时,从句用一般现在时.

d.arrives 主句将来时态 从句一般现在时态

D
时间状语从句,主句将来时,从句现在时

d.arrives
主句是一般现在时,从句是一般将来时

d.arrives
当...就,已经表示将来的意思了。而且arrive没有将来时的。

d
到达四川这个事件发生在发信息之前,所以用一般现在时

D 时间状语从句记住主将从现

D