— Better get down to your work, Jack. —_________.
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.
25.With so little time ______ on math, it is all too easy for children to ignore practicing mathematics, which is a kind of language.