The river, ______the bank are covered with trees, is very long.
#4972
A
whose
B
which
C
of which
D
which of
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Only when __________________ permission _______________ allowed to enter the lab.
#4817
A
a teacher has given; are the students
B
has a teacher given; are the students.
C
has a teacher given; the students are
D
a teacher has given; the students are