题干
．The teacher , with 6 gilrs 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
9°N，95.9°E）发
生地震并引起海啸。该地震发生时，地球在公转轨道上的
