债权人甲以借条证明他与债务人乙之间存在借贷法律关系,此借条属于()
A.直接证据
B.本证
C.反证
D.书证
参考答案:A, B, D
根据WHO估计,全球有多少盲人是可以避免的()。
A.46%
B.60%
C.12.5%
D.80%
E.90%
The teenagers wonder ______ makes Jay a successful pop singer. [ ]
A. what is it that
B. what it is that
C. that it is
D. what. is it that