Ⅰ.用适当的介、副词填空
1.Describe to your partner what might happen ________ the objects in the photos.
2.Imagine your home begins to shake and you must leave it right ________.
3.A smelly gas came out ________ the cracks.
4.________ about 3∶00 am ________ July 28,1976,some people saw bright lights ________ the sky.
5.Steam burst ________ holes ________ the ground.
6.________ fifteen terrible seconds a large city lay ________ ruins.