If you _____ busy next week ,please let me know.

问题描述:

If you _____ busy next week ,please let me know.
A.will be B.be C./ D.are

D 条件状语从句中主句是一般将来时态,从句要用一般现在时,祈使句或情态动词[主将从现原则](主将从现,将并非指将来时,还只表示将来含义的),并且,切记紧跟着if的那句话是从句.)