—________. The beaches there are very beautiful and we also enjoyed some fresh seafood.
A：Not badly
B：Very much
C：Very good
D：So well
5+7=____
5–4=____
18–8=____
8＋5＋ 2=____
15–10=____
6–3=____
7+7=____
3 + 7 + 9=____
11+7 =____
2+8=____
19–10=____
8 – 3 + 9=____
8+8=____
10–8=____
5+10=____
12 –2 + 4=____
10 + 8=____
11 –10=____
10 –7=____
9 + 10 –5=____
根据所学知识填空：
