问题

He kept on _______ the mountains all by _______ for three days.
A:work on
B:try on
C:pass on
D:depend on;
B:try on
C:pass on
D:depend on;
正确答案是:
同类题型
The President ________ that he would visit France the following month.
I’m _____ too much weight, doctor.— You’d better take more exercise.
The place ________ interested me most was the Children’s Palace.
He was accused _____taking ______drugs when he was at school , so he was questioned by the police