话本
参考答案：
话本原是说话人演讲故事所用的底本，是随着民间说话技艺发展起来的一种文学形式。
______that blood diseases are going to continue, we’ll have to______ them.
A．Assumed; doing research at
B．Assuming; do research on
C．Assuming; do research for
D．Being assumed; do research on
