Question

The first thing __________ my brother is going to do this afternoon is to write a letter．

1. A.
   which
2. B.
   that
3. C.
   why
4. D.
   who

Answer 1

B
解析：
本题考查定语从句that的用法。在定语从句中先行词为当先行词是不定代词all, much, something, everything, anything, nothing, none, the one, thing时，不定代词用that．在定语从句中当先行词为物时，用which或that；C项为副词，在定语从句充当状语，与题意不符，故排除。D项当先行词为人时，用who或whom．故选B。