根据中文意思,用所给词组的适当形式填空,每空一词
1、Take it easy and don't be too__ __(对……严格要求) yourself.
2、I__ __(收到……来信）my best friend ywo days ago.
3、I couldn't __ __(入睡）last night.It was too noisy.
4、They are __ __(忙于做）their homework.
5、He almost __ __(发疯）when his brother died.