Seeing their son playing computer games all day, the parents don’t know ______ it.

Seeing their son playing computer games all day, the parents don’t know ______ it.

A．how to do                             B．what to do

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

Seeing their son playing computer games all day, the parents don’t know ______ it.

A. how to do

B. what to do

C. how to deal with

D. how to do with

Seeing their son playing computer games all day, the parents don’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