All the students come from America are here.A. whoB. whichC. /D. that

问题补充：

All the students come from America are here.

A. who

B. which

C. /

D. that

答案：

(答案→)A. who

B. which

C. /

D. that

解析：考查定语从句。句中先行词为the students，在从句中作主语，故用关系词who，句意：来自美国的所有的学生都在这儿。