1.咱们不喝咖啡改喝茶吧。
Let’s drink tea _______ _______ coffee.
2.字母x代表未知数。
The letter “x” _______ _______ an unknown number.
3.那时街上一个人也没有。
_______ _______ was in the street at that moment.
4.本周我们还有两节数学课。
We will have _______ _______ maths classes this week.
5.学习的目的不是为了参加考试。
The point of studying is not to _______ _______.