As a new diplomat, he often thinks of_____- he can react more appropriately on such occasions.
Your desk is covered with too many unnecessary things, including used papers and books. You’d better ________ some of them.
On arrival at the flood-stricken village, the PLA soldiers set ______ rescuing the villagers.
He gave us another piece of advice, ________ of great help to the research work.
Only when _____ in the afternoon _____ able to leave.
Mike was our ________ customer, who used to shop here on Sundays.