As we know, in our Chinese history _____ was a time when industry was only a home business.

A. it                     B. there         C. that           D. what

As we know, in our Chinese history _____ was a time when industry was only a home business.

1. A.
   it
2. B.
   there
3. C.
   that
4. D.
   what

As we know, in our Chinese history _____ was a time when industry was only a home business.

A. it                     B. there         C. that           D. what

.As we know, in our Chinese history _____ was a time when industry was only a home business.

A. it                            B. there           C. that              D. what

As we know, in our Chinese history _____ was a time when industry was only a home business.

A．it           B．there           C．that            D．what