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On the bus I saw a student____ I thought was your brother.
A．who B．whom C．which D．/
On the bus I saw a student________I thought was your brother.
A．who B．whom
C．he D．him
On the bus I saw a student ________ I thought was your brother.
A．who
B．whom
C．he
D．him
On the bus I saw a student ________ I thought was your brother．
C．which
D．whoever