题干
_______ of the area _______ covered by trees.
A：Two-third; is
B：Two thirds; is
C：Two-third; are
D：Two thirds; are
答案(点此获取答案解析）
B
_______ of the area _______ covered by trees.
A：Two-third; is
B：Two thirds; is
C：Two-third; are
D：Two thirds; are
