1.they discussed 3 different ---to the study of maths.

1.they discussed 3 different ___to the study of maths.a.approaches b.means c.methods d.ways.2.the date of the meeting has ___ from 10 to 3.a.swept b.advanced c.pulled d.gone 我看我妹妹的卷子这两题怎么选的a 和 b 但是我觉得不对啊!请问这两个题中的四个词分别有什么区别呢?3.you'd better make a mark __ you don't understand .a.that b.where这道题我知道选where 但是我妹妹问我为什么不能选that,我却说不出!approach to 不是表示冲某个方向接近吗？