已知在网格中每个小正方形的边长都是1，图1中的阴影图案是由一条对角线和以格点为圆心，半径为2的圆弧围成的弓形．

甲、乙、丙三家超市为了促销一种定价相同的商品，甲超市先降价20%，后又降价10%；乙超市连续两次降价15%；丙超市一次降价30%。那么顾客到哪家超市购买这种商品更合算（   ）

关于时刻和时间间隔，下列说法中正确的是（   ）

用所给词的适当形式填空 
1. A year ____(divide) into 12 star signs.
2. The first ____ (clone)sheep was named Dolly.
3. Stop____(argue) about it. Let’s be friends again.
4. The____(relax) music made us even____ (relax).
5. Amy has just had his bicycle____(repair).
6. It's a good ____ (choose) to____(choose) him as our monitor.
7. It's much____(sun) today than yesterday.
8. ____ (eat) too much is ____（health）for our health..
9. Your advice will be of great ____(valuable) to us .
10. I____ (colour) the card orange ____(cheer)you up and it brought you joy.