There is a wide ________ of reference books to be found, so _______ you look for some
material needed, you can turn to me.
A. kind; the last time B. sort; every time
C. variety; next time D. type; the moment
There is a wide ________ of reference books to be found, so _______ you look for some
material needed, you can turn to me.
A. kind; the last time B. sort; every time
C. variety; next time D. type; the moment