根据汉语意思完成句子，每空一词。
1.学英语时不要害怕犯错误。
Don't be afraid of ________ ________ when learning English.
2.你打算如何处理这个难题？
How will you ________ ________ the difficult problem?
3.王先生常常为他的儿子感到自豪。
Mr. Wang often ________ ________ ________ his son.
4.至于你，我认为你不必亲自去了。
As for you，I don't think you have to go ________ ________.
5.无论他说什么，都别相信。
Do not trust him，________ ________ what he says.