定语从句的题目Whether you go or not,------- is quite all right with

注意逗号前是一个条件状语从句,逗号后是该状语从句的主句,that 在此作代词代表前文所述的情况,用作主句的主语.类似地,下面几道题也选 that,而不选 which：
（1） If you promise to go with us,_____ will be OK.
A.as B.which C.and it D.that
（2） If you want a double room,_____ will cost another ￡15.
A.as B.which C.what D.that
（3）When I say two hours,_____ includes time for eating.
A.as B.which C.what D.that