题干

_____half of all languages in the world spoken by fewer than 3500 people each,linguists(语言学家) have been making great efforts.
A.In sight ofB.In defense of
C.In need ofD.In case of
上一题 下一题 0.85难度 单项选择 更新时间:2018-06-27 10:01:10

答案(点此获取答案解析)