Question

Not only he but also his parents  _____China for two years .

1. A.
   have been in
2. B.
   has been in
3. C.
   has come to
4. D.
   have come to

Answer 1

A
根据后文的时间状语内容for two years，判断时态为现在完成时，同时动词应该为延续性动词，只有答案为A。