Seeing the car trapped in the snow drift, the driver didn’t know ______ it.

1. A.
   how to do
2. B.
   what to do
3. C.
   how to deal with
4. D.
   how to do with

Seeing the car trapped in the snow drift, the driver didn’t know ______ it.

A. how to do           B. what to do

C. how to deal with      D. how to do with

Seeing the car ________ in the snow drift, the driver didn't know ________ it.

[　　]

A．trapped; what to do with

B．was trapped; how to do

C．trapping; what to deal with

D．which trapped; what to do