—Are you familiar with the music?
— Yes. There was a time _____ this kind of music was quite popular.
A：that
B：when
C：with which
D：about which
My bad tooth ________ again and I will have it ________ out next week.
近来，小华为了看清书上的字，眼睛与书的距离和视力正常时相比越来越近了，这说明小华已（ ）
约翰和大卫曾在发生核泄漏事故的电厂附近生活过。最近发现约翰的儿子患有常染色体的隐性遗传病甲，大卫的女儿患有常染色他显性遗传病乙，约翰与大卫及他们的妻子都很正常。请根据上述材料来回答问题：
The children are having fun _________ on the beach（海滩）.
