1 . The satellite enables us to ________ (计算) their precise location anywhere in the world. （根据汉语提示单词拼写）

2 . The couple ________ (calculate) that the cost spent in building their new house will add up to $100,000.（所给词的适当形式填空）

3 . I c________ that the total cost for treatment would be $12500.（根据首字母单词拼写）

5 . With the development of technology,scientists now have no difficulty c_______the time when the spaceship will reach the moon.

6 . It’s difficult to________ (计算) what effect all these changes will have on the company. （根据汉语提示单词拼写）

7 . Students will have their temperatures measured at school gates and must show a "green" health code on a special app that a person's infection risk.

A．celebrates

B．cancels

C．calculates

D．combines