问题
选择题
-- How are you planning to travel to Shanghai?
--- I ______ yet, but I ______ taking a train.
A．didn’t decide; am considering
B．haven’t decided; consider
C．haven’t decided; am considering
D．hadn’t decided; have considered
答案
答案：C
前空表示还没有决定，用现在完成时；后空表示现在正在做的事，用进行时。