—That must have been a long trip.
—Yeah, it us a whole week to get there.
A. takes
B. has taken
C. took
D. was taking
网友回答
A. takes
B. has taken
(答案→)C. took
D. was taking
解析：根据上文的信息词 must have been可知是与过去有关，由此可知下文是陈述过去的一个事实。故用一般过去时。句意：——那一定是一次长途旅行。——是的，花了我们一整星期才到达那。