Question

---- How long was it ______ you finally reached your goal of becoming a doctor?
---- Five years.

A．before

B．since

C．when

D．until

Answer 1

A

試題分析：本題實(shí)際上考察的是固定句式：固定句式：It /That/This is the...time that sb have done sth；It /That/This was the...time that sb had done sth。“這是某人第幾次做某事的時(shí)候了”；結(jié)合日常生活實(shí)際，能夠計(jì)算到這是第幾次做某事，表明該動(dòng)作已經(jīng)發(fā)生，因此，要用完成時(shí)態(tài)——主句用現(xiàn)在時(shí)，從句用現(xiàn)在完成時(shí)；主句用過去時(shí)，從句用過去完成時(shí)。只不過本句是一個(gè)特殊疑問句，對其中的一段時(shí)間進(jìn)行提問。句義：多久以后你才實(shí)現(xiàn)你做醫(yī)生的目標(biāo)？—5年。故A正確。