1. Your suggestions are ________(value). Thanks a lot.
2. My mother was even _______(发疯) when father went out angrily.
3. Most students think homework is the ________(原因) of stress.
4. When we have some problems, they can offer us some _______(suggest)
5. This book will be of great ________(价值)to him in his study.
6. We should not disturb the _______(平衡) of nature.
7. Sandy listened with _______(高兴) to the beautiful music.
8. It is ________(累人的) for Jim to finish so many exercise every day.
