______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.
Were you _______ when you saw that wild animal?
_______ the composition, John handed it to the teacher and went out of the room.
."Can you read?" Mary said _______ to the notice.
The visiting Minister expressed his satisfaction with the talks, _______ that he had enjoyed his stay here.
"We must keep a secret of the things _______ here", the general said, _______ at the man in charge of the information office.