--- I will come to attend your lecture at 10:00 tomorrow. --- I’m sorry, by then my lecture will have ended and I ______ my guests in my office.
33. _____ the television on at night, he disturbed others. You’d better speak to him.
32. _____in charge of the shopping center, Bob had to read magazines to kill time.
31. It is on the maglev train that is very comfortable _____ I have been to the People’s Square.
30. The price _____ should have made you realize it was a trick.
29. They made many records, _____ they will always be remembered.