根据句意和所给汉语完成句子。每空一词
【小题1】His grandfather is very __________（严肃的）and I hardly see him laugh.
【小题2】I think I need a new __________（镜子）.
【小题3】Do you think it is a __________（真正）beautiful park？
【小题4】His daughter is __________（有才能的）.She can always finish hard work very well.
【小题5】I don't like __________（响亮的）music.
【小题6】__________（两个都）of the twins are very thin.
【小题7】Let her do it if __________（必要的）.We should believe in her.
【小题8】They were very sad because they didn't get good __________（成绩）in the English test.