I had ______ feeling of happiness when I heard that he had made ______ great progress.
30.Napoleon would have taken over the world if he ______ the Battle of Waterloo.
29.—How did he break his head while swimming? —______ my warnings, he dived straight into the shallow water.
28.You ______ very fast if you went from New York to Boston in six hours.
27.—Do you know when Phil's coming? —He ______ 4: 00.
26.Even if there is no scientific proof yet ______ secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.