there are so many footprints____the snow.

there are so many footprints____the snow.
a.in b.on c.above d.under
our school will be more beautiful__.
a.two years ago b.after two years time
c.in two years time d.in two years' time
many people enjoy_____for the Inter-national Meeting without money
a.to work b.working c.work d.to working
my aunt______to bangkok twice a year.
a.will go b.goes c.go d.don't go