Some office equipment, including two desks and two computers, ________ sold a few minutes ago.
Li Yang, the founder of Crazy English, says that he copies it down _______ he comes to a sentence.
This is the third time I _______ Beijing. The second time I ______ here was on Christmas Day last year.
Computers can do a lot of things nowadays, but _____ more still need to be done by man.
Lectures were _____ so students could be more focused on their study for the finals.
He _____ on the bench, with his head down and his eyes _____ on the ground.