A)unless
B)when
C)since
D)although
正确答案:C答案:C
[试题分析]句间关系判断题。
[详细解答]所填词引起原因从句,对前句进行说明。所以填入C项since符合句意。

上一篇 In bringing up the concept of GASPthe author is making the point that A.shareh
下一篇 茶碱的最佳血浆治疗浓度为A.10~20mg/LB.20~30rug/LC.5~15mg/LD.20~40mg/LE.30~50mg/L