一、选择填空(共20小题；每小题1分，满分20分)
1．Jim is under ________ for drug-trading. If you continue doing the same thing, you will get ________, too.
A. arrest, arrested B. suspicion, killed C. pressure, arrest D. stress, caught
2．_______ the tunnel, a gold kettle was found.
A. While digging B. On digging
C. When they dig D. When they were digging
