When he realized the police had seen him, the man ________the exit as quickly as possible.

—  Why don’t you go into the office ,John —I have ______ my office keys at home.

He tried to cope with the ever-increasing burden of his work, but finally he _____ and had to take a complete rest．

—How about your journey to Mount Tai ? —Everything was wonderful except that our car ____twice on the way.

I'd like a job which pays more, but_________ I enjoy the work I'm doing at the moment.