I think ______ is necessary ______ us to do something useful to protect the birds.
You can imagine how different the table manners here are from ______.
Are you ready? We’ll go out for a picnic ____ three o’clock.
—I’m too nervous to give a talk before so many people? —_________, Maria. I think you can make it.
—I was asked to attend the meeting before eight. —Oh, you________. I'm sorry for not telling you that we have changed the plan.
What ___ you____ at ten yesterday evening?