题干
Theteacher,with6 girls and 8 boys of her class, __________visiting a museum when the earthquake struck.
A：wa
B：were
C：had bee
D：would be
答案(点此获取答案解析）
A
A：wa
B：were
C：had bee
D：would be
表示4xyz，“方框”
表示﹣5abdc，
的值．
