. 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 |