A recent study has found that the number of smokers ________ sharply over the past five years.
A.is increasing |
B.are increasing |
C.has been increasing |
D.have been increasing |
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A recent study has found that the number of smokers ________ sharply over the past five years.
A.is increasing |
B.are increasing |
C.has been increasing |
D.have been increasing |
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