The first thing ____ you should do is to learn all the new words by heart.

          A. what            B. that            C. which        D. who

The first thing ____ you should do is to learn all the new words by heart.

    A. what               B. that               C. which            D. who

The first thing ____ you should do is to learn all the new words by heart.

A. what　　　　　　 B. that　　　　　　　 　 C. which　　　　　 D. who

The first thing ________ you should do is to learn all the new words by heart．

1. A.
   what
2. B.
   that
3. C.
   which
4. D.
   who

The first thing____you should do is to learn all the new words by heart.

           A.what              B.that             C.which          D.who