书名：怪物讲师 P.247
题目：
The client that ______yesterday expressed his gratitude for receiving our excellent service.
(A) to him
(B) him
(C) to
(D) for
疑问：选A句子不是很完整吗？有代名词当受格使字句完整，虽然答案说client是移到前面当先行词，后面不用加，但总觉得有加个代名词him比较合理，各位是如何解体的呢？