题干
33. The medicine works more effectively _______ you drink some hot water after taking it.
A：a
B：until
C：although
D：If
答案(点此获取答案解析）
D
A：a
B：until
C：although
D：If
＋3
＝0，则直线AB与x轴的交点的横坐标为（ ）