--- Do you know _____ Mr. Black’s address is. --- He may live at No. 18 or No. 19 of Bridge Street. I'm not sure of _____.
Please excuse my __ in without __.
He can’t help __ housework, for he is busy __ for the examination.
________her mother had come, her face lit up.
The situation is more ________than ever. I'm ________about what to do next.
Linda can't attend the party________ at Tom's house at present because she is preparing a speech for the party ________ at Marie's house tomorrow.