Change the direct narration into
indirect narration :
The teacher said to the students,
“You must study hard for the test on
comprehension.”
A The teacher told the students that they must
study hard for the test on comprehension.
B The teacher told the students that
they had to study hard for the test on
comprehension.
C The teacher told the students that
they could study hard for the test on
comprehension.
D The teacher told the students that they
are going to study hard for the test on
should it be a or b