一种商品价格（P）上涨，会引起其替代商品（Ql）需求量的变化，同时也会引起其互补商品（Q2）需求量的变化。下列曲线图中正确反映它们之间的变动关系的是
It has been five days ______ the little girl left home. A. since B. after C. until
The man makes a living teaching. A. for B. with C. by
The only language ____ is easy to learn is mother tongue.
It is well-known that such a thing must ________ happening again.
-I wonder if your wife will go to the party. -If your wife ____ ，so _______ .
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