I don't think they know ___(exact)what they're doing.

问题描述:

I don't think they know ___(exact)what they're doing.
something interest/interesting?
instead ___
for him B of him C of he Dfor he
She ___(feel)a little sick near the end of the trip.
Allen said that he ____(teach)himself how to ride a bike years ago

exactly
/ interesting /B
/ felt 意思:旅程快结束时她感到有些不适.
/ had taught为什么是taught?艾伦说他是多年前自学骑自行车的。 这里应该用过去完成时,teach himself是发生在said之前,同时动作产生了影响