选择题 Tom will go out for a picnic with his friends after he________his breakfast.
【正确答案】 C
【答案解析】时态"主将从现"介词after引导时间状语从句时,遵循"主将从现"原则,即主句为将来时或含有将来意味的时态,从句为一般现在时。因此本题应选C。