采区开采结束后（）天内，必须在所有与已采区相连通的巷道中设置防火墙，全部封闭采区。
A、30
B、45
C、60
参考答案：B
Read and circle. (读一读，选出适当的单词)
1. I usually ____ do / does morning exercises at 8:30.
2. He ____ eat / eats dinner at 7:00 in the morning.
3. What's ____ you / your favorite season?
4. Because I ____ can / do sleep for a long time.
5. I often ____ play / played football after school.
远期汇票付款时间的规定方法，主要有（）。
A、出票后若干天付款
B、见票后若干天付款
C、提单签发日后若干天付款
D、货到目的港后若干天付款
E、指定日期付款
