在下列各句的每个空格内填上一个适当的完整的单词，该词的首字母已给。
Don’t be scared to make m_____________ when you speak a foreign language.
The shoes are too expensive. I can’t a _________ it.
Can you tell me the i__________ of English learning?
His favorite dog’s d___________ makes him very sad.
It is not right to w________ time and money.