Frank， look! Who are the children under the tree___waiting in a line？
They are the students from No． 1 Primary School．（ ）
A．that areB．where areC．which isD．who is
Frank， look! Who are the children under the tree___waiting in a line？
They are the students from No． 1 Primary School．（ ）
A．that areB．where areC．which isD．who is
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