The children were last seen ___ by theriver.

The fog is so thick that the express way ____ have been closed. — You are right. I ____ have thought of that. Now we have to take another road.

She has a gift for creating an atmosphere for her students________allows them to communicate freely with each other

Have you known Dr Jackson for a long time? — Yes, since she _____the Chinese Society[ ]

Five men and three women make up the temporary group to look into the case. In otherwords，it _____ eight people.