---Look! What a nice and clean toilet!   ---Yes. It ______ every morning.
#37598
A
is cleaned
B
has been cleaned
C
is being cleaned
D
was cleaned
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No one knew what        because of the thick fog.
#39880
A
he had happened
B
had happened to him
C
had he happened
D
has happened to him
Jeremy Lin __________ an unknown basketball player in New York Knicks for quite a long time.
#40498
A
used to be
B
used to being
C
is used to be
D
was used to be
I’ll do it better if my mother _______ me to try one more time.
#42066
A
allow
B
will allow
C
allows
D
allowing
He said he_____ to my home in a week.
#42207
A
would come
B
came
C
comes
D
will come