题目内容
根据括号中的英语解释及首字母提示，写出句中所缺的单词。
Blue can represent u ________(sadness)．
Some colours can i ________(affect)our m ________(feelings)．
I w ________(hope)to see him right now．
We r ________(need)some food and water now．
The little boy began to r ________(know)his mistake．
