How bright ! The ground is covered 　　　　　　　　　　　　________ snow.

[　　]

A．by　　　B．with　　　C．of　　　D．in

In Autumn the ground is always covered with ________．

1. A.
   fallen leaves
2. B.
   fallen leaf
3. C.
   falling leaves
4. D.
   falling leaf

Most of the ground is ________ forest and grass.

[　　]

A．covered for

B．covered by

C．covered with

D．covered of

Most of the ground is ________ forest and grass.

[　　]

A．covered for

B．covered by

C．covered with

D．covered of