The story of Tom Sawyer ______ in Missouri, America, in the 19th century.
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A
had happened
B
was happening
C
has happened
D
happened
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—I called you last night, but no one answered me.—Oh, I________ a shower.
#36468
A
have taken
B
was taking
C
took
D
will take
Listen, who______ in the classroom?
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A
sings
B
sing
C
is singing
D
singing
Look at our new school. It ____ last year.
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A
built
B
was built
C
is built
D
will be built