His forgetfulness may be a ____ of brain trouble.
举一反三
- Thinking is the best way to train our brain; lacking in brain _______ may cause brain shrinkage.
- His life was _________ by trouble.
- 209. The lighthouse if at night may be in trouble.
- You should forgive him for his forgetfulness; after all he is over seventy.
- If I don't get the assignment finished in time, I'll be __________. A: in trouble. B: troublesome C: out of trouble D: into trouble