问题
选择题
We can't complain that children are cheating in examinations ______ adults themselves have set such a bad role model for them to follow.
A．because
B．unless
C．when
D．though
答案
答案：C
题目分析：句意：如果成年人自己为孩子树立这么差的榜样让他们效仿，我们不能抱怨孩子考试作弊。这里用when表示“如果，既然”，A. because因为，B. unless除非，如果不， D. though虽然，选C。