Mr.Brown knew nothing about the good news ____ his wife told it to himA beforeB afterC sinceD if
问题描述：
Mr.Brown knew nothing about the good news ____ his wife told it to him
A before
B after
C since
D if
答
A before
根据意思，在他夫人告诉他“之前” 他对这条新闻一无所知
答
A .
know nothing about...... before
之前对...一无所知
答
A before 根据意思,在他夫人告诉他“之前” 他对这条新闻一无所知.
B after 意思为在······之后,与句意矛盾
C since意思为
prep.从……以来；自从……之后；自从
adv.以后,此后；后来；（距今几年）以前；（从那时候起几年）以前
conj.自从……以来；自从……的时候起；既然；由于,
明显与句意矛盾
D if 如果 放在此处也不合适,所以选A