—Do you know______next Friday, Lily?
—If it doesn't rain, we will.
A：if we will take a field trip
B：will we take a field trip
C：why we will take a field trip
—Can you help me with my maths?
—_______, I know _______ about it.
成吉思汗的主要功绩是（ ）
与沙海连绵，荒漠广布的西亚相比，纬度大体相当的珠江流域却绿野相连，城市集中，人口密集。缔造中国这一富饶宝地的最大功绩应属于自然因素中的（ ）
