One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.
A.is; has | B.is; have | C.are; have | D.are; has |
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One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.
A.is; has | B.is; have | C.are; have | D.are; has |