Q15:
Dressed as a man and using the name Robert Shurtleff, Deborah Sampson, the first woman to draw a soldier’s pension, joined the Continental Army in 1782 at the age of 22, was injured three times, and was discharged in 1783 because she had become too ill to serve.
- 22, was injured three times, and was discharged in 1783 because she had become
- 22, was injured three times, while being discharged in 1783 because she had become
- 22, and was injured three times, and discharged in 1783, being
- 22, injured three times, and was discharged in 1783 because she was
- 22, having been injured three times and discharged in 1783, being
答案是A，我选D
选D的理由是，虽然三个句子变成两个句子并列，但似乎也说得通，joined the Continental Army in 1782 and was discharged in 1783.
不选择A的理由是，becuase she had become too ill to serve.似乎在解释为什么joined the Continental Army, was injured three times and was discharged in 1783.这三个动作，容易引起歧异。
当然，如果because有就近原则，我就选A^ ^ | 
