62.His expenditure on holidays and luxuries is rather high in（ ）to his income.

23.The daisy-like flowers of chamomile have been used for centuries to（ ）anxiety and insomnia.

22.If you intend to melt the snow for drinking water, you can（ ）extra purity by running it through a coffee filter.

21.Some narratives seem more like plays, heavy with dialogue by which writers allow their（ ）to reveal themselves.

20.You must fire（ ）incompetent assistant of yours.

19.At that moment, with the crowd watching me, I was not afraid in the ordinary sense, as（ ）if I（ ）alone.

18.Some martian rock structures look strikingly like structures on Earth that are known（ ）by microbes.

17.Timothy Ray Brown, the first man cured of HIV, initially opted against the stem cell transplantation that（ ）history.

16.“It’s a shame that the city official should have gone back on his word.” The modal auxiliary SHOULD express（ ）.

15.“If I were you, I wouldn’t wait to propose to her.” The subjunctive mood in the sentence is used to（ ）.

14.“I wondered if I could have a word with you” The past tense in the sentence refers to a（ ）.