When drinking from a well , one must not forget ______who dug it.
A these B that C those D them
爲什麽選C不能選D啊

________has been done to develop the habit of reading aloud in the morning ,his pronunciation remains a serious problem.
A In spite of that B In spite of what C Although he D Though
what
這題是選B，那這裡的In spite of後面跟的算是短語嗎

第一题：those有明确的指向性，即“那些挖过井的人”，而them就只是指“他们”，没有具体指向，用在这里不贴切。

第二题：in spite of是一个介词短语，其后面跟的是宾语；这个句子中：what是宾语，其后的“has been done to develop the habit of reading aloud in the morning”是用来修饰what的。
而that则是用来引导限定性定语从句的，后面要+完整的句子成分（至少是“主语+谓语”的形式）。