Please help my friend. I really appreciate it． Let me guess this riddle.

1 en route (type a mathematical term)-radius (or "equation")

2 Fapi (type a place name)-Cap

Three cents (philosophical term)-one divides into two.

Four people must walk by (type a word)-and

5 Hairtail is delicious (one word)-sheep.

6 1000 (to use an idiom)-full of loopholes.

7 Toshiba, Mitsubishi, Sanyo (an educational noun)-full-time.

8 lightning tactics (name a country)-Czech Republic

Looking forward to every day (to use a life phrase)-dating.

10 Don't forget your roots (with a three-character title)-Old Secretary

1 1 Earrings (for sports)-rings

Establish a clean government in China (name two solar terms)-Long Summer and Qingming.

12 negative (with physical terms)-phenomenon

13 Four walls of the family (with physical terms)-space

14 Yao (three mathematical terms)-except, hypotenuse, similar triangles.

15 smart (in telecom terms)-well informed.

/kloc-more than 0/6 (hit an idiom-be vividly portrayed.