My mother _______________ my aunt called her.
#41811
A
was cooking while
B
cooked when
C
cooked while
D
was cooking when
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There _________ a concert on Qixing Square next Monday evening.
#42339
A
is
B
is going to
C
is going to be
D
will have
—Look, the palace is so great.—Yeah, it nearly 800 years ago.
#39284
A
was building
B
was built
C
has built
D
is built