問題詳情：
用所給單詞的適當形式填空。
’s never too old to learn. Karl Marx began to learn English in his _______(forty).
should be brave when we meet illness and _____________(difficult).
ning some knowledge of psychology is _____________(value)to all the teachers.
__________(simple) can’t wait for the fashion show tomorrow.
Brown will give some________(speak)on how to improve English next week.
【回答】
ies iculty able ly ches
知識點：構詞法
題型：完成句子
