Question

Seldom        as lonely as now though I have been living in Fuzhou for more than 20 years

1. A.
   have I felt
2. B.
   I had felt
3. C.
   I have felt
4. D.
   had I felt

Answer 1

A
句意：我在福州已经住了20多年了，但很少像现在这样孤独。由seldom 可知需要使用部分倒装结构，同时我们不难判断应使用现在时态。