Mr. Smith came to our school in 2003. He _____ here for 10 years.
#36225
A
works
B
worked
C
will work
D
has worked
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—Excuse me, Mum. When can we have dinner?—Not until it                in half an hour.
#39775
A
is prepared
B
will be prepared
C
has been prepared
D
was prepared
The mobile phone has influenced people’s life a lot since it      .
#39054
A
invents
B
invented
C
is invented
D
was invented