--More and more people think __ necessary to let the students teach themselves.

-- That's true. They can improve themselves in this way.

A. it has           B. it            C. that

--More and more people think __ necessary to let the students teach themselves.
-- That’s true. They can improve themselves in this way

1. A.
   it has
2. B.
   it
3. C.
   that

--More and more people think______ necessary to let the students teach themselves.

--That's true. They can improve themselves in this way.

A．it has               B．it              C．that

--More and more people think __ necessary to let the students teach themselves.
-- That’s true. They can improve themselves in this way.
A. it has           B. it            C. that

—More and more people think ________ necessary to let the students teach themselves．

—That's true．They can improve themselves in this way．

1. A.
   it has
2. B.
   it
3. C.
   that
4. D.
   it does