The traffic lights ______ green and I pulled away. 

After the speech, she was invited by the students _ ____ with them．

 Not only food and clothing but also medical treatment has been       the people who need it in the flooded areas.

 He began to take political science ________ only when he left school.(2013·湖北)

We looked forward to _______ at eight in the morning, but he didn’t turn _______ until 9 o’clock..