I was late for school because my alarm didn’t .
—What colour is _______ orange ? —It's____ orange .
---Would you like me to take you to the new park?---__________. I’ve been there once.
It is said that the meeting _______ for a week.
--I hear this kind of CD-ROM is very popular.--Let’s buy one before it ____________.
This problem is ______ difficult __________.