问两道语法题

uniqueness

问两道语法题  谢谢各位

1.Oceans continually lose bu evaporation much of the river water___
  A.to constantly flow into them
  D.constanly flowing into them
我能理解为什么选D，但想知道A为什么不行，不定式不也能做后置定语么？

2.(serving) as chief of the USA children's Breau from 1921ti 1924.Grace Abbott (fought) for       the (rights) of women and children (through) the world.

    through哪错了？怎么改？

3.Reptiles are (widely distributed) all over the world,but are (much) abundant in warm regions and are (virtually) absent (beyond) the treeline in the Arctic.
          much 为什么要改为more？还是不是很理解

谢谢了！

winners

1.这里是修饰water,不定式是表目的.....
2.through------throughout
3.好像没有说much abundant，要是表示多的话，abundant就可以了。