镜____ 费____ 普____
境____ 废____ 朴____
北宋沈辽诗曰:“山田遶(绕)山脚,江水何可作。车轮十涨围,飞湍半天落。……有如万夫力,讙呼倾众壑。曾不舍昼夜,美源终未涸。”诗中描述的农业生产工具是( )
There are two foreign students in the group and ____ (both/all) of them come from Canada.
21-12=____
31-13=____
41-14=____
51-15=____