The new model ________ the market in three months, all the shops are now selling the old model at a discount.
#90608
A
hitting
B
hit
C
having hit
D
to hit
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The airport________next year will help promote tourism in this area. 
#89492
A
being completed
B
to be completed
C
completed
D
having been completed
    around the lab, we were taken to see the library.
#95015
A
Being shown
B
Showing
C
Having been shown
D
To show