25. The firemen broke down the wall in order to gain quick access ________ the building on fire.
A. toward B. to C. of D. into
26. A few years ago, scientists in the Antarctic became aware of ________ in the ozone layer.
A. holes growing B. holes to grow
C. holes’ being grown D. holes to be grown
27. The ground is wet. It must have rained last night, ______it?
A. hasn’t B. wasn’t C. didn’t D. mustn’t
