All the donations to ORBIS in two days A will send B must sent C were sent D must be sent

问题补充：

All the donations to ORBIS in two days,

A will send B must sent C were sent D must be sent

答案：

解析：in two days表示将来，本题的主语为动作的承受者，故本题使用被动句，结构为be+动词过去分词，must在将来时可以使用，后跟动词原形，故本题选D。