The issue of protecting cultural heritage was of _______ importance _______ we could not afford to ignore it.
The reason ____ he was late for the meeting was _____ he forgot to use the alarm clock.
The leaders of the company are having a meeting to discuss where the new office building __.
---Have you ______ some new ideas? --- Yeah, I’ll tell you later.
---How long is it _____ we last met? --- About five years. You haven’t changed much.
_____ tomorrow, our ship will set sail for Macao.