Many young people in the West are expected to leave ______ could be life’s most important decision --- marriage---almost entirely up to luck.
Forty percent of the students in our class are boys, ____are girls.
They were all very tired, but ___of them would stop to take a rest.
If a student can make what ___has been learned , whether in class or from social practice,he will make steady progress.
----- Is there anyone who is going to the Great Wall? ----______ .
---- There’s coffee and tea; you can have ____. ----Thanks.