【正文】
_____oneself (alone) 自己讀書 23. at ____ ___ ___ four = when she was 4 24. decide _____(try) out (試用;選拔 ) 25. learn ___(do)… teach sb. ___(do)… 26. go on a (different) ____ 進行一次不一樣旅行 27. _____(volunteer) here ___(be)good for him. 28. at the ____time 同時 29. be busy ___(介詞 )sth. be busy ___(do).. 忙著做 … 30. be _____about sb./ sth./ _____(do)… 擔心 … 31. They did what they can _____(help) others. 32. _____(volunteer) our time _____(help) these people _____(be) a good way______(spend) our free time. (1)動名詞做主語,表單數。 動 詞 , 自愿做 volunteer__(do) 4. hope_____