— It seems that he is ______ our village.

— He spent ______ of his childhood here. [ ]

A. new to; most

B. familiar with; part

C. similar to; a part

D. like; much

欲调查某地HBsAg携带情况，可采用（）

A.抽样调查

B.前瞻性调查

C.个例调查

D.爆发调查

E.回顾性调查