So suddenly ________that the animals in the zoo looked very frightened during the total solar eclipse (日全食)．
| A．did the sky turn dark | B．the sky did turn dark |
| C．turned the sky dark | D．was the sky turned dark |
When I came in, I saw her sitting in the sofa ______ in thought.
| A．to lose | B．losing | C．lost | D．being lost |
We all like the way _____ the teacher gives his lessons.
| A．which | B．that | C．what | D．how |
There was a fire accident in the hotel last night. Fortunately everyone had a(n) _____ escape from the fire and no one was hurt.
| A．narrow | B．likely | C．shallow | D．unique |
With his attention _____ on his book, he didn’t notice me enter his study.
| A．focusing | B．focused | C．to focus | D．focus |
Unfortunately, it rained for two weeks, which completely _______ our plan.
| A．ruined | B．harmed | C．crashed | D．attacked |