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_________ has already been pointed out, grammar is not a set of dead rules.

 _______ has already been pointed out,  grammar is not a set of dead rules.

    A. As            B. It              C. That                 D. Which

 _________ has already been pointed out, grammar is not a set of dead rules.

A. As                       B. It                C. That           D. What

__________ has already been pointed out, grammar is not a set of dead rules.

A. As　　　 　　　　　　　 B. It

C. That　　　 　　　　　　　 D. Which

_ _____ has already been pointed out, grammar is not a set of dead rules.

A. As    B. It         C. That      D. This

_____ has already been pointed out , grammar is not a set of dead rules.

A.As           B.It           C.That         D.Which

.

 _______ has already been pointed out, grammar is not a set of dead rules.

   A. As                B. It                 C. That               D. Which