— How many students are going to the Great Wall? — ____.
You should have put the milk into the icebox, I expect it ______ undrinkable.
This is an ideal site for a university ______ it is far from The downtown area.
I turned down his invitation to dinner as I didn't want to ______ on him.
I understand ______ preparation that staff must put in under pressure to meet the deadline.
We should always keep in mind that ______ decisions often lead to bitter regrets.