Today David is busy doing his homework. So he has no time ____ (play) computer games.
Last year the teacher told us that the Earth ____ (go) around the Sun.
2017年我国实施的一系列新政将影响百姓的生活，如启动医保跨省就医结算；医保卡基本实现全国一卡通……这些新政确立的总依据是（ ）
