二、单项填空(共15分)21. ---I’m sorry I shouldn’t have laughed at you the day before. --- _________ .
It gives his life a flying start ______ he has gone abroad for further education.
Children are taught to respect everyone, ______ race, sex or age.
What is the best way you can imagine ______the overuse of water in our school?
We should do what we have to do ______ we can do what we want to do in the future.
Please don’t phone him between 1 and 3 p.m. tomorrow. He _____ a lecture then.