My suggestion is that a plan for study ( B ) at first. A.will be made B.be made C.was made D.madeMy suggestion is that a plan for study ( B ) at first.A.will be made B.be made C.was made D.made为什么选B 请解释清楚一点谢

My suggestion is that a plan for study ( B ) at first. A.will be made B.be made C.was made D.madeMy suggestion is that a plan for study ( B ) at first.A.will be made B.be made C.was made D.made为什么选B 请解释清楚一点谢
My suggestion is that a plan for study ( B ) at first. A.will be made B.be made C.was made D.made
My suggestion is that a plan for study ( B ) at first.
A.will be made B.be made C.was made D.made
为什么选B 请解释清楚一点
谢谢大家

My suggestion is that a plan for study ( B ) at first. A.will be made B.be made C.was made D.madeMy suggestion is that a plan for study ( B ) at first.A.will be made B.be made C.was made D.made为什么选B 请解释清楚一点谢
B.be made
我的建议是,一个学习计划,要首先（被）做好.
可见是被动的,
再有,suggestion /suggestion 这些表示,建议,指示,暗示,等意义的词,
常用should +V 原型.
所以,就要用should + be made
should 可以省略.

释义：sugeest的宾语从句中和suggestion的表语从句中要用“虚拟语气”，此时的结构应该是“should ＋ 动词原形”，should可省。
因此：My suggestion is that a plan for study be made at first.
＝My suggestion is that a plan for study should be made at first.
祝你进步！