Obama delivered a speech to 500local youths during his visit to China, many of ____ from Fudan University and Tongji University

He ________ to the cinema last night, for he stayed with me.

are you sure your aunt ___ back from America—Yes. My mother ___ me. I am going to see her now.

On foggy days, you have to drive very ________ on the expressway to avoid traffic accidents

Could you come to my office ________ theday after tomorrow.