The cartoons made by the artists sell best ,but several years ago no one could imagine how great a role he _____ in the field.
A.was playing | B.was to play | C.had played | D.played |
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The cartoons made by the artists sell best ,but several years ago no one could imagine how great a role he _____ in the field.
A.was playing | B.was to play | C.had played | D.played |