By law,when one makes a large purchase, he should have _____ opportunity to change his mind.

There is a ______ cup on the table.

We were          at what he said．

When they came in, Mr Harris＿＿＿＿＿＿like a baby. Nobody would like to wake him from a good dream,because he needed rest. 

Sex education is a sensitive area for some parents, and thus it should remain _________.