to

• I must keep to myself, at least for some time .
  我暂时还要秘而不宣。
• Whistles began to shrill outside the barn .
  哨声开始在谷仓外面尖叫。
• I could hear them crying out to one another .
  我听得见他们相互呼应。
• We ought to follow her good example .
  她是个好榜样，我们应当仿效她。
• Wasn't he afraid to go there by himself ?
  他不怕独自一人到那里去吗？
• Nick went all out to win the race .
  尼克尽最大努力去赢得赛跑的胜利。
• Their concern seems to be unwarranted .
  他们的担心似乎是没有必要的。
• The stream had thinned down to a mere trickle .
  这条小河变成细流了。
• It's my turn. don't try to sidetrack me .
  这是我的事，你别转移话题。