问题
选择题
So far nothing _____ Tom. I want to know the reason _______ he hasn’t written to me.
A．heard from; why
B．has been heard from; why
C．was heard from; that
D．has heard from; that
答案
答案：B
含有so far的句子应该时现在完成时态；reason作先行词，定与从句应该用that引导。