Please send my best wishes when you go to visit your grandparents.
A. their
B. they
C. them
D. theirs
网友回答
A. their
B. they
(答案→)C. them
D. theirs
解析：A. 形容词性物主代词,他们的 B.人称代词主格他们 C. 人称代词宾格,他们 D.名词性物主代词,他们的.句意:当你去拜访你的祖父母时,请送给他们我们最好的祝福.此处代词为动词宾语,故应用宾格形式,故选C.