Cathy is taking notes of the grammatical rules in class at Sunshine School, where she ______ English for a year. 
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A
studies
B
studied
C
is studying
D
has been studying
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The discovery of gold in Australia led thousands to believe that a fortune______.
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A
I made
B
would make
C
was to be made
D
had made
 His uncle went abroad in 2010, and __________ since.
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A
had not been heard of
B
has not been heard of
C
had not heard of
D
has not heard of
— Watch out! The petrol __. — Oh, my God. We have to find a service station soon enough.
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A
runs out
B
has run out
C
is running out
D
has been run out
With the development of science, more new technology ______to the field of IT.
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A
has introduced
B
is being introduced
C
is introduced
D
was introduced