I sat here ________ him,but he didnt arrive.

单项选择题Alice has gone to the classroom and she didnt say ________.

单项选择题What do you think ________

单项选择题Bob, ________ sure to come to the meeting early tomorrow!

单项选择题I see the runners ________ on the playground.

单项选择题Would you please tell me ________ next， Mr. Wang？