问题描述：
Who is the person -------- is standing at the gate?
A that B he C whom D who
He passed the exam this time,------ pleased his parents.
A it B which C this D who
He told us the things and person ------ he had been interested in.
A what B which C that D who
A that B he C whom D who
He passed the exam this time,------ pleased his parents.
A it B which C this D who
He told us the things and person ------ he had been interested in.
A what B which C that D who
问题解答：
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