My friend John insisted that he had seen ______ alien the day before.
#34434
A
a
B
an
C
some
D
any
推荐题目
Mrs. Green usually goes shopping with _____ umbrella in ______ summer.
#33626
A
a; the
B
an; /
C
the; a
D
/ ; /
We can have ___ bluer sky if we create ___ less polluted world.
#34197
A
a. a
B
a, the
C
the, a
D
the, the
