About ______ of the land ______ covered with trees and grass．（ ）
| A． |
three fifths； is |
B． |
three fifths； are |
C． |
three fifth； are |
About ______ of the land ______ covered with trees and grass．（ ）
| A． |
three fifths； is |
B． |
three fifths； are |
C． |
three fifth； are |
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