it is d____ for us to fly to the sky by ourselves
it is d____ for us to fly to the sky by ourselves
it can fly in the sky.i go to Beijing by it. it is an ______
it is i___ for us to fly to the moon at present.
It is necessary to allow us students to ( ) by ourselves A.m
fly to the sky
To fly in the sky is expected by all the people
It is very c__ that we have to finish the work by ourselves
it's____ ____ (posible ) for us to fly to the moon
Fly to the sky to you.
it's good way for us to slove the problem by learning to for
our teacher tells~us not to go to the river by ourselves.
It is _ difficlt for us to climb the mountains