1．Imagine climbing (climb)up to the 80th floor of your office building without an elevator.
2．The problems to_be_discussed (discuss)at the meeting tomorrow are really hard to_solve (solve).
3．(2019·天津一中月考)To_remind (remind)myself of the past pleasant days, I have some related photos pinned beside my desk.
4．Having_waited (wait)for the bus for thirty minutes, he lost his patience and felt very anxious.
5．It is an honor for me to_stand (stand)here to give you some advice on how to prepare for the coming examination.
6．You begin to understand how Chinese speakers have their thoughts organized (organize), and how they understand things.
7．We've had a good start，but next，more work needs to be done/doing (do)to achieve the final success.
8．The puzzled (puzzle)expression on his face suggested that he didn't understand what I had said.
